Maxtor Computer Drive 51024U2 User Manual

DiamondMax Plus 40

54098U8,53073U6,52049U4,

51536U3,51024U2

Part #1429/A

MaxFax™ is a trademark of Maxtor Corporation. DiamondMax^®, Maxtor^®

and No Quibble^®Service are registered trademarks of Maxtor Corporation.

Other brands or products are trademarks or registered trademarks of their

respective holders. Contents and specifications subject to change without

Corporate Headquarters

510 Cottonwood Drive

Milpitas, California 95035

Tel: 408-432-1700

Fax: 408-432-4510

Research and Development Center

2190 Miller Drive

Longmont, Colorado 80501

Tel: 303-651-6000

Fax: 303-678-2165

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DIAMONDMAX PLUS 40 PRODUCT MANUAL

Contents

Section 1—Introduction

Maxtor Corporation

Products

1 - 1

1 - 2

Support

Manual Organization

Abbreviations

Conventions

Key Words

Numbering

Signal Conventions

Section 2—ProductDescription

The DiamondMax^®Plus 40

Product Features

2 - 2

2 - 3

2 - 4

2 - 5

2 - 6

Functional/Interface

Zone Density Recording

Read/Write Multiple Mode

UltraDMA - Mode 4

Multi-word DMA (EISA Type B) - Mode 2

Sector Address Translation

Logical Block Addressing

Defect Management Zone

On-the-Fly Hardware Error Correction Code (ECC)

Software ECC Correction

Automatic Head Park and Lock Operation

Cache Management

Buffer Segmentation

Read-Ahead Mode

Automatic Write Reallocation (AWR)

Write Cache Stacking

Major HDA Components

Drive Mechanism

Rotary Actuator

Read/Write Electronics

Read/Write Heads and Media

Air Filtration System

Microprocessor

Subsystem Configuration

Dual Drive Support

Cable Select Option

Jumper Location/Configuration

Cylinder Limitation

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DIAMONDMAX PLUS 40 PRODUCT MANUAL

Section 3—ProductSpecifications

Models and Capacities

Drive Configuration

Performance Specifications

Physical Dimensions

Power Requirements

Power Mode Definitions

Spin-up

3 - 1

3 - 2

3 - 3

3 - 4

3 - 5

Seek

Read/Write

Idle

Standby

Sleep

EPA Energy Star Compliance

Environmental Limits

Shock and Vibration

Reliability Specifications

Annual Return Rate

Quality Acceptance Rate

Start/Stop Cycles

Data Reliability

Component Design Life

EMC/EMI

EMC Compliance

Canadian Emissions Statement

Safety Regulatory Compliance

Section 4—Handling and Installation

Hard Drive Handling Precautions

Electro-Static Discharge (ESD)

Unpacking and Inspection

Repacking

4 - 1

4 - 2

4 - 3

4 - 4

4 - 5

Physical Installation

Before You Begin

Please Read

Back up. Protect Your Existing Data

Tools for Installation

System Requirements

Operating System Requirements

Hook up

Boot the System with MaxBlast Plus Diskette

Configure the Drive Jumpers

Installaing 5.25-inch Mounting Brackets

Install Hard Drive in Device Bay

Attach Interface and Power Cables

Start up

Set up

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DIAMONDMAX PLUS 40 PRODUCT MANUAL

Section 5—AT Interface Description

Interface Connector

Pin Description Summary

Pin Description Table

PIO Timing

5 - 1

5 - 2

5 - 3

5 - 4

5 - 5

DMA Timing

Ultra DMA Timing Parameters

Section 6—Host Software Interface

Task File Registers

6 - 1

6 - 2

6 - 3

6 - 4

6 - 5

6 - 6

Data Register

Error Register

Features Register

Sector Count Register

Sector Number Register

Cylinder Number Registers

Device/Head Register

Status Register

Command Register

Read Commands

Write Commands

Mode Set/Check Commands

Power Mode Commands

Initialization Commands

Seek, Format, and Diagnostic Commands

S.M.A.R.T. Commands

Summary

Control Diagnostic Registers

Alternate Status Register

Device Control Register

Digital Input Register

Reset and Interrupt Handling

Section7—InterfaceCommands

Command Summary

Read Commands

Read Sector(s)

7 - 1

7 - 2

7 - 3

7 - 4

Read Verify Sector(s)

Read Sector Buffer

Read DMA

Read Multiple

Set Multiple

Write Commands

Write Sector(s)

iii

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DIAMONDMAX PLUS 40 PRODUCT MANUAL

Write Verify Sector(s)

Write Sector Buffer

Write DMA

7 - 4

7 - 5

7 - 7

7 - 9

7 - 12

7 - 13

7 - 14

Write Multiple

Ultra DMA

Set Feature Commands

Set Features Mode

Power Mode Commands

Standby Immediate

Idle Immediate

Standby

Idle

Check Power Mode

Set Sleep Mode

Default Power-on Condition

Initialization Commands

Identify Drive

Initialize Drive Parameters

Seek, Format, and Diagnostic Commands

S.M.A.R.T. Command Set

Section 8—Service and Support

Service Policy

No Quibble Service

Support

8 - 1

Glossary

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DIAMONDMAX PLUS 40 PRODUCT MANUAL

Figures

Figure

Title

Page

2 - 1

3 - 1

4 - 1

4 - 2

4 - 3

4 - 4

4 - 5

4 - 6

4 - 7

5 - 1

5 - 2

5 - 3

5 - 4

5 - 5

5 - 6

5 - 7

5 - 8

5 - 9

5 - 10

5 - 11

5 - 12

5 - 13

PCBA Jumper Location and Configuration

2 - 6

3 - 2

4 - 2

4 - 3

4 - 5

4 - 6

4 - 7

4 - 10

5 - 1

5 - 3

5 - 4

5 - 5

5 - 6

5 - 7

5 - 8

5 - 9

5 - 10

Outline and Mounting Dimensions

Multi-pack Shipping Container

Single-pack Shipping Container (Option A)

Single-pack Shipping Container (Option B)

Master, Slave and Cable Select Settings

5.25-inch Mounting Brackets and Rails

IDE Interface and Power Cabling Detail

Master, Slave and Cable Select Settings

Data Connector

PIO Data Transfer to/from Device

Multi-word DMA Data Transfer

Initiating an Ultra DMA Data In Burst

Sustained Ultra DMA Data In Burst

Host Pausing an Ultra DMA Data In Burst

Device Terminating an Ultra DMA Data In Burst

Host Terminating an Ultra DMA Data In Burst

Initiating an Ultra DMA Data Out Burst

Sustained Ultra DMA Data Out Burst

Device Pausing an Ultra DMA Data Out Burst

Host Terminating an Ultra DMA Data Out Burst

Device Terminating an Ultra DMA Data Out Burst

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DIAMONDMAX PLUS 40 – INTRODUCTION

SECTION 1

Introduction

MaxtorCorporation

Maxtor Corporation has been providing high-quality computer storage products since 1982. Along the way,

we’ve seen many changes in data storage needs. Not long ago, only a handful of specific users needed more than

a couple hundred megabytes of storage. Today, downloading from the Internet and CD-ROMs, multimedia,

networking and advanced office applications are driving storage needs even higher. Even home PC applications

need capacities measured in gigabytes, not megabytes.

Products

Maxtor’s products meet demanding storage capacity requirements with room to spare. They feature proven

compatibility and reliability. While DiamondMax^®Plus 40 is the latest addition to our legacy of high

performance 7,200 RPM desktop and workstation hard drives, our DiamondMax^®VL 20 series hard drives

deliver industry-leading capacity, reliability and value for entry-level systems and consumer electronics

applications.

Support

No matter which capacity, all Maxtor hard drives are supported by our commitment to total customer

satisfaction and our No Quibble Service^®guarantee. One call – or a visit to our home page on the Internet

(http://www.maxtor.com) – puts you in touch with either technical support or customer service. We’ll

provide you the information you need quickly, accurately and in the form you prefer – a fax, a downloaded

file or a conversation with a representative.

ManualOrganization

This hard disk drive reference manual is organized in the following method:

❏ Section 1 – Introduction

❏ Section 2 – Description

❏ Section 3 – Specifications

❏ Section 4 – Installation

❏ Section 5 – AT Interface

❏ Section 6 – Host Software Interface

❏ Section 7 – Interface Commands

❏ Section 8 – Service and Support

❏ Appendix – Glossary

Abbreviations

ABBRV DESCRIPTION

ATA AT attachment

bpi bits per inch

MB megabyte

Mbits/sec megabits per second

CHS cylinder - head - sector

db decibels

MB/sec megabytes per second

MHz megahertz

dBA decibels, A weighted

DMA direct memory access

ECC error correction code

fci flux changes per inch

ms millisecond

MSB most significant bit

mV millivolts

ns nanoseconds

acceleration

PIO programmed input/output

RPM revolutions per minute

tpi tracks per inch

GB gigabyte

Hz hertz

KB kilobyte

UDMA ultra direct memory access

µsec microsecond

LBA logical block address(ing)

LSB least significant bit

mA milliamperes

volts

watts

1 – 1

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DIAMONDMAX PLUS 40 – INTRODUCTION

Conventions

If there is a conflict between text and tables, the table shall be accepted as being correct.

Key Words

The names of abbreviations, commands, fields and acronyms used as signal names are in all uppercase type

(e.g., IDENTIFY DRIVE). Fields containing only one bit are usually referred to as the “name” bit instead of

the “name” field.

Names of drive registers begin with a capital letter (e.g., Cylinder High register).

Numbering

Numbers that are not followed by a lowercase “b” or “h” are decimal values. Numbers that are followed by

a lowercase “b” (e.g., 01b) are binary values. Numbers that are followed by a lowercase “h” (e.g., 3Ah) are

hexadecimal values.

Signal Conventions

Signal names are shown in all uppercase type.

All signals are either high active or low active signals. A dash character (-) at the end of a signal name

indicates that the signal is low active. A low active signal is true when it is below ViL and is false when it is

above ViH. A signal without a dash at the end indicates that the signal is high active. A high active signal is

true when it is above ViH and is false when it is below ViL.

When a signal is asserted, it means the signal is driven by an active circuit to its true state.

When a signal is negated, it means the signal is driven by an active circuit to its false state.

When a signal is released, it means the signal is not actively driven to any state. Some signals have bias

circuitry that pull the signal to either a true or false state when no signal driver is actively asserting or negating

the signal. These instances are noted under the description of the signal.

1 – 2

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PRODUCT DESCRIPTION

SECTION 2

Product Description

Maxtor DiamondMax^®Plus 40 AT disk drives are 1-inch high, 3.5-inch diameter random access storage devices

which incorporate an on-board ATA-5/Ultra DMA 66 controller. High capacity is achieved by a balanced

combination of high areal recording density and the latest data encoding and servo techniques.

Maxtor's latest advancements in electronic packaging and integration methods have lowered the drive's power

consumption and increased its reliability. Advanced giant magneto-resistive read/write heads and a state-of-the-art

head/disk assembly - using an integrated motor/spindle design - allow up to four disks in a 3.5-inch package.

Exceptionally high data transfer rates, 7,200 RPM spin speed and < 9.0 ms access times make these performance

series disk drives especially well-suited to high-end desktop and server applications.

DiamondMaxPlus40KeyFeatures

ANSI ATA-5 compliant PIO Mode 4 interface (Enhanced IDE)

Supports Ultra DMA Mode 4 for up to 66.7 MB/sec data transfers

2 MB buffer with multi-adaptive cache manager

7,200 RPM spin speed

< 9.0 ms seek time

Zone density and I.D.-less recording

Outstanding shock resistance at 250 Gs

High durability with 50K contact start/stop cycles

Advanced multi-burst on-the-fly Error Correction Code (ECC)

Extended data integrity with ECC protected data and fault tolerant servo synchronization fields

Supports EPA Energy Star Standards (Green PC Friendly) with ATA powering savings commands

Auto park and lock actuator mechanism

Low power consumption

S.M.A.R.T. Capability

Note: Maxtor defines one megabyte as 10⁶or one million bytes and one gigabyte as 10⁹or one billion bytes.

2 – 1

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PRODUCT DESCRIPTION

Product Features

Functional/Interface

Maxtor DiamondMax Plus 40 hard drives contain all necessary mechanical and electronic parts to interpret control

signals and commands from an AT-compatible host computer. See Section 3 Product Specifications, for complete

drive specifications.

Zone Density Recording

The disk capacity is increased with bit density management – common with Zone Density Recording. Each

disk surface is divided into 16 circumferential zones. All tracks within a given zone contain a constant

number of data sectors. The number of data sectors per track varies in different zones; the outermost zone

contains the largest number of data sectors and the innermost contains the fewest.

Read / Write Multiple Mode

This mode is implemented per ANSI ATA/ATAPI-5 specification. Read/Write Multiple allows the host to

transfer a set number of sectors without an interrupt request between them, reducing transfer process

overhead and improving host performance.

UltraDMA - Mode 4

Maxtor DiamondMax Plus 40 hard drives fully comply with the new ANSI Ultra DMA protocol, which

greatly improves overall AT interface performance by significantly improving burst and sustained data

throughput.

Multi-word DMA (EISA Type B) - Mode 2

Supports multi-word Direct Memory Access (DMA) EISA Type B mode transfers.

Sector Address Translation

All DiamondMax Plus 40 drives feature a universal translate mode. In an AT/EISA-class system, the drive may

be configured to any specified combination of cylinders, heads and sectors (within the range of the drive's

formatted capacity). DiamondMax Plus 40 drives power-up in a translate mode:

MODEL

54098U8

53073U6

52049U4

51536U3

51024U2

CYL

SPT LZone

WPcom

(*)

MAX LBA

80,041,248

60,030,432

40,020,624

30,015,216

20,010,816

CAPACITY

40,980 MB

30,735 MB

20,490 MB

15,367 MB

10,245 MB

79,406

59,554

39,703

29,777

19,852

(*)

(*) The fields LZone (Landing Zone) and WPcom (Write Pre-comp) are not used by the Maxtor hard drive

and the values may be either 0 or the values set by the BIOS. All capacities listed in the above table are based

on 10⁶or one million bytes.

Logical Block Addressing

The Logical Block Address (LBA) mode can only be utilized in systems that support this form of translation. The

cylinder, head and sector geometry of the drive, as presented to the host, differs from the actual physical

geometry. The host AT computer may access a drive of set parameters: number of cylinders, heads and sectors

per track, plus cylinder, head and sector addresses. However, the drive can’t use these host parameters directly

because of zoned recording techniques. The drive translates the host parameters to a set of logical internal

addresses for data access.

The host drive geometry parameters are mapped into an LBA based on this formula:

LBA

= (HSCA - 1) + HHDA x HSPT + HNHD x HSPT x HCYA

= (HSCA - 1) + HSPT x (HHDA + HNHD x HCYA)

HSCA = Host Sector Address, HHDA = Host Head Address

HCYA = Host Cylinder Address, HNHD = Host Number of Heads

HSPT = Host Sectors per Track

(1)

(2)

where

2 – 2

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PRODUCT DESCRIPTION

The LBA is checked for violating the drive capacity. If it does not, the LBA is converted to physical drive

cylinder, head and sector values. The physical address is then used to access or store the data on the disk and

for other drive related operations.

Defect Management Zone (DMZ)

Each drive model has a fixed number of spare sectors per drive, all of which are located at the end of the

drive. Upon detection of a bad sector that has been reassigned, the next sequential sector is used.

For example, if sector 3 is flagged, data that would have been stored there is “pushed down” and recorded

in sector 4. Sector 4 then effectively becomes sector 3, as sequential sectors are “pushed down” across the

entire drive. The first spare sector makes up for the loss of sector 3, and so maintains the sequential order of

data. This push down method assures maximum performance.

On-the-Fly Hardware Error Correction Code (ECC)

5 symbols, single burst, guaranteed

Software ECC Correction

22 symbols, single burst, guaranteed

Automatic Park and Lock Operation

Immediately following power down, dynamic braking of the spinning disks delays momentarily allowing the

read/write heads to move to an inner mechanical stop. A small fixed magnet holds the rotary actuator in

place as the disk spins down. The rotary actuator is released only when power is again applied.

CacheManagement

Buffer Segmentation

The data buffer is organized into two segments: the data buffer and the micro controller scratch pad.

The data buffer is dynamically allocated for read and write data depending on the commands received.

A variable number of read and write buffers may exist at the same time.

Read-Ahead Mode

Normally, this mode is active. Following a read request, disk read-ahead begins on the first sector and

continues sequentially until the allocated buffer is full. If a read request is received during the read-ahead

operation, the buffer is examined to determine if the request is in the cache. If a cache hit occurs, read-

ahead mode continues without interruption and the host transfer begins immediately.

Automatic Write Reallocation (AWR)

This feature is part of the write cache and reduces the risk of data loss during deferred write operations. If a

disk error occurs during the disk write process, the disk task stops and the suspect sector is reallocated to a

pool of alternate sectors located at the end of the drive. Following reallocation, the disk write task continues

until it is complete.

Write Cache Stacking

Normally, this mode is active. Write cache mode accepts the host write data into the buffer until the buffer

is full or the host transfer is complete. A command complete interrupt is generated at the end of the transfer.

A disk write task begins to store the host data to disk. Host write commands continue to be accepted and

data transferred to the buffer until either the write command stack is full or the data buffer is full. The drive

may reorder write commands to optimize drive throughput.

2 – 3

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PRODUCT DESCRIPTION

MajorHDAComponents

Drive Mechanism

A brush-less DC direct drive motor rotates the spindle at 7,200 RPM ( 0.1%). The dynamically balanced

motor/spindle assembly ensures minimal mechanical run-out to the disks. A dynamic brake provides a fast

stop to the spindle motor upon power removal. The speed tolerance includes motor performance and motor

circuit tolerances.

Rotary Actuator

All DiamondMax Plus 40 drives employ a rotary voice coil actuator which consists of a moving coil, an

actuator arm assembly and stationary magnets. The actuator moves on a low-mass, low-friction center shaft.

The low friction contributes to fast access times and low power consumption.

Read/Write Electronics

An integrated circuit mounted within the sealed head disk assembly (near the read/write heads) provides up

to eight head selection (depending on the model), read pre-amplification and write drive circuitry.

Read/Write Heads and Media

Low mass, low force giant magneto-resistive read/write heads record data on 3.5-inch diameter disks. Maxtor

uses a sputtered thin film medium on all disks for DiamondMax Plus 40 drives.

Air Filtration System

All DiamondMax Plus 40 drives are assembled in a Class 100 controlled environment. Over the life of the

drive, a 0.1 micron filter and breather filter located within the sealed head disk assembly (HDA) maintain a

clean environment to the heads and disks. DiamondMax 40 drives are designed to operate in a typical office

environment with minimum environmental control.

Microprocessor

The microprocessor controls the following functions for the drive electronics:

Command execution

Cache management

Data correction and error recovery

Diagnostic execution

Data sequencing

Head positioning (including error recovery)

Host interface

Index detection

Spin speed control

Seeks

Servo

S.M.A.R.T.

2 – 4

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PRODUCT DESCRIPTION

SubsystemConfiguration

Dual Drive Support

Two drives may be accessed via a common interface cable, using the same range of I/O addresses. The drives

are jumpered as device 0 or 1 (Master/Slave), and are selected by the drive select bit in the

Device/Head register of the task file.

All Task File registers are written in parallel to both drives. The interface processor on each drive decides

whether a command written to it should be executed; this depends on the type of command and which

drive is selected. Only the drive selected executes the command and activates the data bus in response to

host I/O reads; the drive not selected remains inactive.

A master/slave relationship exists between the two drives: device 0 is the master and device 1 the slave.

When J50 is closed (factory default, figure 2-1), the drive assumes the role of master; when open, the drive

acts as a slave. In single drive configurations, J50 must be closed.

Cable Select Option

CSEL (cable select) is an optional feature per ANSI ATA specification. Drives configured in a multiple drive

system are identified by CSEL’s value:

– If CSEL is grounded, then the drive address is 0.

– If CSEL is open, then the drive address is 1.

JumperLocation/Configuration

Darkened jumper pins indicate factory-installed (default) shunts.

+12 VDC

JUMPER CONFIGURATION

J50

J48

J46

J44

J42

Master/Slave

+12 V return

+5 V return

+5 VDC

Only drive in single drive system*

Master drive in dual drive system*

Slave drive in dual drive system

EIDE Interface Connector

J1 – pin 1

Cable Select

Disabled*

Enabled

Cylinder Limitation

Disabled*

Enabled

Power Connector

J50 - Master/Slave

J48 - Cable Select

Factory Reserved

J46 - Cylinder Limitation

J44 - Factory Reserved

J42 - Factory Reserved

Key * = Default C = Closed (jumper installed) O = Open (no jumper installed)

Figure2-1

PCBAJumperLocationandConfiguration

CylinderLimitationJumperDescription

On some older BIOS', primarily those that auto-configure the disk drive, a hang may occur. The Cylinder

Limitation jumper reduces the capacity in the Identify Drive allowing large capacity drives to work with older

BIOS'. The capacity reported when J46 is closed will be as follows: drives less than or equal to 32GB will

report 2.1GB. Drives greater than 32GB will report 32GB.

2 – 5

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PRODUCT SPECIFICATIONS

SECTION 3

ProductSpecifications

ModelsandCapacities

MODEL

54098U8

53073U6

52049U4

51536U3

51024U2

40,980

30,735

20,490

15,367

10,245

Formatted Capacity (MB LBA Mode)

Maxtor defines one megabyte as 10⁶or one million bytes and one gigabyte as 10⁹or one

billion bytes.

DriveConfiguration

MODEL

54098U8

53073U6

52049U4

51536U3

51024U2

Integrated Controller / Interface

Encoding Method

Interleave

ATA-5 / Ultra DMA

E²PR4 RLL 16/17

1:1

Servo System

Embedded

2 MB SDRAM

Buffer Size / Type

Data Zones per Surface

Data Surfaces / Heads

Number of Disks

Areal Density

7.245 Gb / in²max

21,500 tpi

270 - 337 kbpi

286 - 358 kfci

512

Track Density

Recording Density

Flux Density

Bytes per Sector / Block

Sectors per Track

Sectors per Drive

325 - 560

80,041,248 60,030,432 40,020,624 30,015,216 20,010,816

PerformanceSpecifications

MODEL

54098U8

53073U6

52049U4

51536U3

51024U2

Seek Times (typical read)

Track-to-Track

1.0 ms

< 9.0 ms

< 20.0 ms

4.17 ms

Average

Full Stroke

Average Latency

Rotational Speed ( 0.1%)

Controller Overhead

Data Transfer Rate

7,200 RPM

< 0.3 ms

To/From Interface

(UltraDMA - M4)

up to 66.0 MB/sec

up to 16.7 MB/sec

To/From Interface

(PIO 4/Multi-word DMA M4)

To/From Media

up to 43.2 MB/sec

< 10 sec typical

Start Time (0 to Drive Ready)

3 – 1

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PRODUCT SPECIFICATIONS

PhysicalDimensions(maximum)

PARAMETER

Height

Length

Width

Weight

STANDARD

1.028 inches

5.787 inches

4.00 inches

1.3 pounds

METRIC

26.1 millimeters

147 millimeters

101.6 millimeters

0.59 kilograms

1.028 max

[26.1 mm max

.25

[6.35

.01

0.25 mm

6 x 6-32

UNC -28

THREAD

1.638

[41.6

.010

1.122

.020

0.5 mm]

0.25 mm] [28.5

4.00

[101.6

.01

0.5 mm]

5.787 max

[147 mm max]

4 x 6-32

UNC -28

THREAD

1.75

[44.95

.01

0.25 mm]

1.625

[41.28

.02

0.5 mm]

.125

[3.18

.010

.025 mm]

Figure 3 - 1

OutlineandMountingDimensions

3 – 2

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PRODUCT SPECIFICATIONS

PowerRequirements

MODE

12V ± 10%

5V ± 5%

620 mA

510 mA

530 mA

490 mA

235 mA

170 mA

POWER

Spin-up (peak)

Seek (avg)

2500 mA

800 mA

350 mA

15 mA

12.9 W

6.8 W

6.6 W

1.4 W

1.0 W

Read/Write (avg)

Idle (avg)

Standby (avg)

Sleep (avg)

15 mA

PowerModeDefinitions

Spin-up

The drive is spinning up following initial application of power and has not yet reached full speed.

Seek

A random access operation by the disk drive.

Read/Write

Data is being read from or written to the drive.

Idle

The drive is spinning, the actuator is parked and powered off and all other circuitry is powered on.

The drive is capable of responding to read commands within 40 ms.

Standby

The spin motor is not spinning. The drive will leave this mode upon receipt of a command that requires

disk access. The time-out value for this mode is programmable. The buffer is active to accept write data.

Sleep

This is the lowest power state – with the interface set to inactive. A software or hardware reset is required

to return the drive to the Standby state.

EPAEnergyStarCompliance

Maxtor Corporation supports the goals of the U.S. Environmental Protection Agency’s Energy Star program

to reduce the electrical power consumption of computer equipment.

EnvironmentalLimits

PARAMETER

OPERATING

NON-OPERATING/STORAGE

Temperature

5° C to 55° C

low temperature (-40° C)

high temperature (71° C) per MIL-STD-810E, method 501.3,

climatic category; hot-induced conditions.

Thermal Gradient

Relative Humidity

Wet Bulb

25° C per hour (maximum)

5% to 95% (non-condensing)

30° C (maximum)

Altitude

-200 to 10,000 feet

-200 to 40,000 feet

Acoustic Noise - Idle Mode

1 and 2 disk models: 3.6 bel

(per ISO 7779, 10 microphone, 3 disk models: 3.7 bel

average sound power)

4 disk models: 3.8 bel

3 – 3

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PRODUCT SPECIFICATIONS

ShockandVibration

PARAMETER

OPERATING

NON-OPERATING

Mechanical Shock

Rotational Shock

Random Vibration

60 Gs, 2.0 ms, no errors

250 Gs, 2.0 ms, no damage

20,000 Rad/sec,0.5 - 1.0 ms, no damage

10 - 45 Hz at 0.004 G²/Hz

48 - 62 Hz at 0.008 G²/Hz

65 - 300 Hz at 0.004 G²/Hz

301 - 500 Hz at 0.0006 G²/Hz

no errors

10 Hz at 0.05 G²/Hz

20 Hz at 0.055 G²/Hz

300 Hz at 0.05 G²/Hz

301 Hz at 0.0014 G²/Hz

500 - 760 Hz at 0.001 G²/Hz

877 Hz at 0.003 G²/Hz

1000 - 1570 Hz at 0.001 G²/Hz

2000 Hz at 0.001 G²/Hz

Swept Sine Vibration

10 - 300 Hz

1.0 G (0 - peak) amplitude

ReliabilitySpecifications

Annual Return Rate

< 1.0%

Annual Return Rate (ARR) indicates the average against products shipped.

ARR includes all reasons for returns (failures, handling damage, NDF), but

does not include inventory credit returns.

Quality Acceptance Rate

< 1,000 DPPM

The quality acceptance rate indicates the percentage of Maxtor products

successfully installed by our customers, and/or the number of defective parts

per million (DPPM) encountered during the entire installation process.

Start/StopCycles

50,000

This indicates the average minimum cycles for reliable start/stop function.

Data Reliability

< 10 per 10¹⁵bits read

Data errors (non-recoverable). Average data error rate allowed with all error

recovery features activated.

Component Design Life

5 years (minimum)

Component design life is defined as a.) the time period before identified

wear-out mechanisms impact the failure rate, or b.) the time period up to the

wear-out point when useful component life expires.

3 – 4

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PRODUCT SPECIFICATIONS

EMC/EMI

Radiated Electromagnetic Field Emissions - EMC Compliance

The hard disk drive mechanism is designed as a subassembly for installation into a suitable enclosure and is

therefore not subject to Subpart J of Part 15 of FCC Rules (47CFR15) or the Canadian Department of

Communications Radio Interference Regulations. Although not required, the disk mechanism has been

tested within a suitable end-use product and found to comply with Class B limits of the FCC Rules and

Regulations of the Canadian Department of Communications.

The CE Marking indicates conformity with the European Union Low Voltage Directive (73/23/EEC) when

the disk mechanism is installed in a typical personal computer. Maxtor recommends that testing and analysis

for EMC compliance be performed with the disk mechanism installed within the user's end-use application.

Canadian Emissions Statement

This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus as set

out in the radio interference regulations of the Canadian department of communications.

Le present appareil numerique n'emet pas de bruit radioelectriques depassant les limites applicables aux

appareils numeriques de Class B prescrites dans le reglement sur le brouillage radioelectrique edicte par le

ministere des communications du Canada.

SafetyRegulatoryCompliance

All Maxtor hard drives comply with relevant product safety standards such as CE, CUL, TUV and UL rules and

regulations. As delivered, Maxtor hard drives are designed for system integration before they are used.

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INSTALLATION

SECTION 4

HandlingandInstallation

HardDriveHandlingPrecautions

N If the handling precautions are not followed, damage to the hard drive may result - which may void the warranty.

N During handling, NEVER drop, jar, or bump a drive. Handle the drive by its sides and avoid touching the printed circuit board

assembly (PCBA).

N Hard drives are sensitive to electrostatic discharge (ESD) damage. Use proper ESD practices by grounding yourself and the

computer system the hard drive will be installed in.

N Allow the hard drive to reach room temperature BEFORE installing it in your computer system.

N NEVER switch DC power onto the drive by plugging an electrically live DC source cable into the drive's connector. NEVER

connect a live connector to the hard drive's IDE interface connector.

^NELECTRICAL GROUNDING - For proper operation, the drive must be securely fastened to a device bay

that provides a suitable electrical ground to the drive baseplate.

Electro-StaticDischarge(ESD)

To avoid some of the problems associated with ESD, Maxtor advises that anyone handling a disk drive use a

wrist strap with an attached wire connected to an earth ground. Failure to observe these precautions voids the

product warranty.

Manufacturers frequently experience “unsolved” component/hardware malfunctions often caused by ESD. To

reduce the incidence of ESD-related problems, Maxtor recommends that any electronics manufacturing plans

include a comprehensive ESD program, the basic elements and functions of which are outlined here:

ESD Program Element

Management

Chief coordinator

Multi-department committee

Employee training

ESD Program Function

Institute and maintain

Organize and enforce

Evaluate and improve

Educate and inform

ESD program supplies typically include: wrist- and foot-worn grounding straps; counter-top and floor antistatic

matting; wrist strap testers; ESD video and training materials. Sources for such supplies include:

Static Control Systems – 3M

225-4S, 3M Center

Charleswater

93 Border St.

St. Paul, MN 55144

West Newton, MA 02165-9990

Maxtor also offers a complete video training package, “Care and Handling of Maxtor Disk Drives.”

Contact your Maxtor representative for details.

4 – 1

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INSTALLATION

UnpackingandInspection

Retain any packing material for reuse. Inspect the shipping container for evidence of damage in transit. Notify

the carrier immediately in case of damage to the shipping container.

As they are removed, inspect drives for evidence of shipping damage or loose hardware. If a drive is damaged

(and no container damage is evident), notify Maxtor immediately for drive disposition.

Figure 4 - 1

Multi-packShippingContainer

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INSTALLATION

Figure 4 - 2

SinglePackShippingContainer(OptionA)

Figure 4 - 3

SinglePackShippingContainer(OptionB)

Repacking

If a Maxtor drive requires return, repack it using Maxtor packing materials, including the antistatic bag.

PhysicalInstallation

Recommended Mounting Configuration

The DiamondMax^®drive design allows greater shock tolerance than that afforded by larger, heavier drives.

The drive may be mounted in any attitude using four size 6-32 screws with 1/8-inch maximum penetration

and a maximum torque of 5-inch pounds. See Figure 3-1 for mounting dimensions. Allow adequate

ventilation to the drive to ensure reliable operation. See the following pages for specific installation steps.

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INSTALLATION

BeforeYouBegin

Important – Please Read

Please read this installation section completely before installing the Maxtor hard drive. It gives general

information for installing a Maxtor hard drive in a typical computer system. If you don’t understand the

installation steps, have a qualified computer technician install the hard drive.

Back up. Protect your Existing Data

Periodic backup of important data is always a good idea. Whenever your computer is on, there is the

potential for losing data on your hard drive. This is especially true when running disk utilities or any software

that directly manipulates your files. Maxtor recommends that you make a backup copy of the files on any

existing hard drives prior to installing the new drive. If required, this data may then be copied to the Maxtor

hard drive after it has been installed in the computer. Refer to your computer user’s manual for detailed data

backup instructions.

Tools for Installation

The following tools are needed to install your new Maxtor hard drive:

• A small (#2) Phillips head screw driver

• Small needle-nose pliers or tweezers

• Your computer user’s manuals

• Operating system software

System Requirements

• IDE/AT interface

Maxtor recommends:

• Drives less than or equal to 8.4 GB – 486 DX 66 MHz

• Drives larger than 8.4 GB – Pentium-class processor

Operating System Requirements

• Drives less than or equal to 8.4 GB:

- DOS 5.0 or higher

• Drives larger than 8.4 GB:

- Installing as boot drive (Primary Master) requires full installation set of Windows 95/98 – not an update

from DOS or Windows 3.x.

- Installing as non-boot drive (Primary Slave, Secondary Master or Slave) requires Windows 95/98 on the

boot drive.

Hookup

Maxtor recommends that you use the MaxBlast™ Plus software to create a customized installation guide for your

system before physically installing your new hard drive. The information created by MaxBlast Plus relates to the

following illustrations.

Boot the System with the MaxBlast Plus Diskette

Before physically installing the Maxtor hard drive, boot your system with the MaxBlast Plus diskette. It will

assist you with the instructions in this section for a successful installation.

Configure the Drive Jumpers

The jumper configurations have three valid jumper settings – Master, Slave and Cable Select. Maxtor hard

drives are always shipped with the Master jumper setting enabled.

Install the 5.25-inch Mounting Brackets

If the Maxtor hard drive will be mounted in a 5.25-inch device bay, you will need to attach 5.25-inch

brackets to the hard drive. These brackets are not required if the drive is mounted in a 3.5-inch device bay.

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INSTALLATION

Install the Hard Drive in a Device Bay

Refer to your computer user’s manual for specific mounting information. Be sure to secure the drive to the

device bay with all four screws.

Attach the Interface and Power Cables

Do not force or rock the connectors into their sockets on the hard drive. Push them in straight until they

are seated.

Note: DiamondMax Hard Drive Kits that carry a “U” in the kit number are UltraDMA 66 compatible hard

drives. A standard IDE cable can be used for drive installation; however, an UltraDMA cable is required to

achieve UltraDMA 66 data transfers in UltraDMA 66 compatible systems. Follow the illustration below for

proper cable connections to the system and hard drive(s) when using this cable.

Attach an IDE interface connector to J1 on the Maxtor drive. Attach a power connector to J2 on the

Maxtor drive. This connector is keyed and will only fit one way. Check all other cable connections before

you power up. Striped/colored edge is pin 1

AfterattachingtheIDEinterfacecableandthe

powercabletotheMaxtorharddrive,verifythat

allothercablesconnectedtootherdevices,the

motherboardorinterfacecard(s)arecorrectly

seated.

Striped/colorededgeispin

Start up

Turn your system ON. During the system start up sequence, run the SETUP (BIOS) program. Newer systems

usually display a message like “press DEL to enter Setup,” showing how to access the SETUP (BIOS) program.

Choose the device position where the Maxtor hard drive will be installed (Primary Master, Primary Slave,

Secondary Master, Secondary Slave or their equivalents) and select the “Auto Detect” option. Save and exit the

BIOS. The system will now boot. Boot to the MaxBlast™ Plus diskette.

Set up

MaxBlast™ Plus will guide you through the steps to prepare (partition and format) your new Maxtor hard drive.

Once you have completed this step, your new Maxtor hard drive will be ready to use.

Note: Do not discard the MaxBlast Plus diskette once the installation is complete. The diskette contains Maxdiag,

a diagnostic utility that is a separate program from the MaxBlast™ Plus installation software.

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AT INTERFACE DESCRIPTION

SECTION 5

ATInterfaceDescription

InterfaceConnector

All DiamondMax^®Plus 40 AT drives have a 40-pin ATA interface connector mounted on the PCBA. The

drive may connect directly to the host; or it can also accommodate a cable connection (maximum cable

length: 18 inches).

Striped Edge (Pin 1)

Drive 1 - Slave (gray)

Drive 0 - Master (black)

System Connector (blue)

Figure5-1

DataConnector

PinDescriptionSummary

SIGNAL

Ground

DD8

Reset -

DD7

DD6

DD9

DD5

DD10

DD4

DD11

DD3

DD12

DD2

DD13

DD1

DD0

DD14

DD15

Ground

(keypin)

Ground

CSEL

DMARQ

DIOW -:STOP

DIOR -:HDMARDY:HSTROBE

IORDY:DDMARDY:DSTROBE

DMACK -

Ground

IOCS16

Obsolete

INTRQ

DA1

DA0

PDIAG -

DA2

CS0 -

DASP -

CS1 -

Ground

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AT INTERFACE DESCRIPTION

PinDescriptionTable

PIN NAME

RESET -

DD0

I/O SIGNAL NAME

SIGNAL DESCRIPTION

Host Reset

Reset signal from the host system. Active during power up and inactive after.

I/O Host Data Bus

16 bit bi-directional data bus between host and drive. Lower 8 bits used for register

and ECC byte transfers. All 16 bits used for data transfers.

DD1

DD2

I/O

DD3

DD4

DD5

DD6

DD7

DD8

DD9

DD10

DD11

DD12

DD13

DD14

DD15

DMARQ

DMA Request

Host I/O Write

Host I/O Read

This signal is used with DMACK for DMA transfers. By asserting this signal, the

drive indicates that data is ready to be transfered to and from the host.

DIOW -

STOP

Rising edge of Write strobe clocks data from the host data bus to a register on the

drive.

DIOR -

HDMARDY

Read strobe enables data from a register on the drive onto the host data bus.

DMA ready during UltraDMA data in bursts.

Data strobe during UltraDMA data out bursts.

HSTROBE

IORDY

DDMARDY

I/O Channel Ready

Cable Select

This signal may be driven low by the drive to insert wait states into host I/O cycles.

DMA ready during UltraDMA data out bursts.

Data strobe during UltraDMA data in bursts.

DSTROBE

CSEL

DMACK -

INTRQ

Used for Master/Slave selection via cable. Requires special cabling on host system

and installation of Cable Select jumper.

DMA Acknowledge This signal is used with DMARQ for DMA transfers. By asserting this signal, the

host is acknowledging the receipt of data or is indicating that data is available.

Host Interrupt

Request

Interrupt to the host asserted when the drive requires attention from the host.

IOCS16

PDIAG -

DA0

Device 16 bit I/O

Obsolete

I/O Passed Diagnostic

Output by drive when in Slave mode; Input to drive when in Master mode.

3 bit binary address from the host to select a register in the drive.

Host Address Bus

DA1

DA2

CS0 -

Host Chip Select 0

Host Chip Select 1

Chip select from the host used to access the Command Block registers in the drive.

This signal is a decode of I/O addresses 1F0 - 1F7 hex.

CS1 -

DASP -

GND

Chip select from the host used to access the Control registers in the drive. This

signal is a decode of I/O addresses 3F6 - 3F7 hex.

I/O Drive Active/Drive 1 Time-multiplexed, open collector output which indicates that a drive is active, or that

Present

device 1 is present.

N/A Ground

Signal ground.

KEY

N/A Key

Pin used for keying the interface connector.

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AT INTERFACE DESCRIPTION

PIOTiming

TIMING PARAMETERS

MODE 0

MODE 1

MODE 2

MODE 3

MODE 4

Cycle Time (min)

600 ns

70 ns

383 ns

50 ns

240 ns

30 ns

180 ns

30 ns

80 ns

70 ns

30 ns

10 ns

20 ns

5 ns

120 ns

25 ns

70 ns

25 ns

20 ns

10 ns

20 ns

5 ns

Address valid to DIOR-/DIOW- setup (min)

DIOR-/DIOW- 16-bit (min)

DIOR-/DIOW- recovery time (min)

DIOW- data setup (min)

165 ns

125 ns

100 ns

t2i

60 ns

30 ns

50 ns

5 ns

45 ns

20 ns

35 ns

5 ns

30 ns

15 ns

20 ns

5 ns

DIOW- data hold (min)

DIOR- data setup (min)

DIOW- data hold (min)

t6Z

DIOR- data tristate (max)

DIOR-/DIOW- to address valid hold (min)

Read Data Valid to IORDY active (min)

IORDY Setup Time

30 ns

20 ns

30 ns

15 ns

30 ns

10 ns

30 ns

10 ns

30 ns

10 ns

tRd

35 ns

1250 ns

35 ns

1250 ns

35 ns

1250 ns

35 ns

1250 ns

35 ns

1250 ns

IORDY Pulse Width (max)

Figure 5 - 2

PIODataTransferTo/FromDevice

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AT INTERFACE DESCRIPTION

DMATiming

TIMING PARAMETERS

MODE 0

MODE 1

MODE 2

Cycle Time (min)

480 ns

150 ns

120 ns

DMACK to DMARQ delay

DIOR-/DIOW- (min)

215 ns

150 ns

5 ns

80 ns

60 ns

5 ns

70 ns

DIOR- data access (min)

DIOR- data hold (min)

5 ns

20 ns

10 ns

DIOR-/DIOW- data setup (min)

DIOW- data hold (min)

100 ns

20 ns

30 ns

15 ns

DMACK to DIOR-/DIOW- setup (min)

DIOR-/DIOW- to DMACK hold (min)

DIOR- negated pulse width (min)

DIOW- negated pulse width (min)

DIOR- to DMARQ delay (max)

DIOW- to DMARQ delay (max)

DMACK- to tristate (max)

20 ns

50 ns

215 ns

120 ns

40 ns

20 ns

5 ns

tKr

tKw

tLr

tLw

50 ns

40 ns

25 ns

35 ns

25 ns

Figure 5 - 3

Multi-wordDMADataTransfer

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AT INTERFACE DESCRIPTION

UltraDMATiming

TIMING PARAMETERS (all times in nanoseconds)

MODE 0

MODE 1

MODE 2

MODE 3

MODE 4

MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX

t_CYC

Cycle Time (from STROBE edge to STROBE edge)

112

t2_CYC

Two cycle time (from rising edge to next rising edge or

from falling edge to next falling edge of STROBE)

230

154

115

t_DS

Data setup time (at recipient)

Data hold time (at recipient)

t_DH

t_DVS

Data valid setup time at sender (time from data bus being

valid until STROBE edge)

t_DVH

Data valid hold time at sender (time from STROBE edge

until data may go invalid)

t_FS

t_LI

First STROBE (time for device to send first STROBE)

230

150

200

150

170

150

130

100

120

100

Limited interlock time (time allowed between an action by

one agent, either host or device, and the following action

by the other agent)

t_MLI

t_UI

Interlock time with minimum

Unlimited interlock time

t_AZ

Maximum time allowed for outputs to release

t_ZAH

t_ZAD

t_ENV

Minimum delay time required for output drivers turning on

(from released state)

Envelope time (all control signal transitions are within the

DMACK envelope by this much time)

t_SR

STROBE to DMARDY (response time to ensure the

synchronous pause case when the recipient is pausing)

t_RFS

t_RP

Ready-to-final-STROBE time (no more STROBE edges may

be sent this long after receiving DMARDY- negation)

Ready-to-pause time (time until a recipient may assume

that the sender has paused after negation of DMARDY-)

160

125

100

t_IORDYZPull-up time before allowing IORDY to be released

t_ZIORDYMinimum time device shall wait before driving IORDY

t_ACK

Setup and hold times before assertion and negation of

DMACK-

t_SS

Time from STROBE edge to STOP assertion when the

sender is stopping

DMARQ

(device)

t_UI

DMACK-

(host)

t_FS

t_ACK

t_ENV

t_ZAD

STOP

(host)

t_FS

t_ACK

t_ENV

HDMARDY-

(host)

t_ZAD

t_ZIORDY

DSTROBE

(device)

t_AZ

t_VDS

t_DVH

DD(15:0)

t_ACK

DA0, DA1, DA2,

CS0-, CS1-

Figure 5 - 4

InitiatinganUltraDMADataInBurst

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AT INTERFACE DESCRIPTION

t_2CYC

t_CYC

t_2CYC

DSTROBE

at device

t_DVH

t_DVS

DD(15:0)

at device

DSTROBE

at host

t_DH

t_DS

t_DH

t_DS

t_DH

DD(15:0)

at host

Figure 5 - 5

SustainedUltraDMADataInBurst

DMARQ

(device)

DMACK-

(host)

t_RP

STOP

(host)

t_SR

HDMARDY-

(host)

t_RFS

DSTROBE

(device)

DD(15:0)

(device)

Figure 5 - 6

HostPausinganUltraDMADataInBurst

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AT INTERFACE DESCRIPTION

DMARQ

(device)

t_MLI

DMACK-

(host)

t_ACK

t_LI

STOP

(host)

t_ACK

t_LI

HDMARDY-

(host)

t_SS

t_IORDYZ

DSTROBE

(device)

t_ZAH

t_AZ

t_DVS

t_DVH

DD(15:0)

CRC

t_ACK

DA0, DA1, DA2,

CS0-, CS1-

Figure 5 - 7

DeviceTerminatinganUltraDMADataInBurst

DMARQ

(device)

t_LI

t_MLI

DMACK-

(host)

t_ZAH

t_AZ

t_RP

t_ACK

STOP

(host)

t_ACK

HDMARDY-

(host)

t_RFS

t_MLI

t_LI

t_IORDYZ

DSTROBE

(device)

t_DVS

t_DVH

DD(15:0)

CRC

t_ACK

DA0, DA1, DA2,

CS0-, CS1-

Figure 5 - 8

HostTerminatinganUltraDMADataInBurst

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AT INTERFACE DESCRIPTION

DMARQ

(device)

t_UI

DMACK-

(host)

t_ACK

t_ENV

STOP

(host)

t_ZIORDY

t_LI

t_UI

DDMARDY-

(device)

t_ACK

HSTROBE

(host)

t_DVS

t_DVH

DD(15:0)

(host)

t_ACK

DA0, DA1, DA2,

CS0-, CS1-

Figure 5 - 9

InitiatinganUltraDMADataOutBurst

t_2CYC

t_CYC

t_2CYC

HSTROBE

at host

t_DVH

t_DVS

DD(15:0)

at host

HSTROBE

at device

t_DH

t_DS

t_DH

t_DS

t_DH

DD(15:0)

at device

Figure5-10

SustainedUltraDMADataOutBurst

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AT INTERFACE DESCRIPTION

t_RP

DMARQ

(device)

DMACK-

(host)

STOP

(host)

t_SR

DDMARDY-

(device)

t_RFS

HSTROBE

(host)

DD(15:0)

(host)

Figure5-11

DevicePausinganUltraDMADataOutBurst

t_LI

DMARQ

(device)

t_MLI

DMACK-

(host)

t_LI

t_ACK

t_SS

STOP

(host)

t_LI

t_IORDYZ

DDMARDY-

(device)

t_ACK

HSTROBE

(host)

t_DVS

t_DVH

DD(15:0)

(host)

CRC

t_ACK

DA0, DA1, DA2,

CS0-, CS1-

Figure5-12

HostTerminatinganUltraDMADataOutBurst

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AT INTERFACE DESCRIPTION

DMARQ

(device)

DMACK-

(host)

t_LI

t_MLI

t_ACK

STOP

(host)

t_RP

t_IORDYZ

DDMARDY-

(device)

t_RFS

t_MLI

t_ACK

t_DVH

t_ACK

t_LI

HSTROBE

(host)

t_DVS

DD(15:0)

(host)

CRC

DA0, DA1, DA2,

CS0-, CS1-

Figure5-13

DeviceTerminatinganUltraDMADataOutBurst

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HOST SOFTWARE INTERFACE

SECTION 6

HostSoftwareInterface

The host communicates with the drive through a set of controller registers accessed via the host’s I/O ports.

These registers divide into two groups: the Task File, used for passing commands and command parameters and

the Control/Diagnostic registers.

TaskFileRegisters

The Task File consists of eight registers used to control fixed disk operations. The host accesses each register

by the I/O port address shown in this Task File register map:

I/O PORT

1F0h

READ

WRITE

Data Register

Error Register

Sector Count

Sector Number

Cylinder Low

Cylinder High

Drive/Head (SDH)

Status Register

Data Register

Features Register

Sector Count

Sector Number

Cylinder Low

1F1h

1F2h

1F3h

1F4h

1F5h

Cylinder High

Drive/Head (SDH)

Command Register

1F6h

1F7h

Data Register

Provides access to the drive’s sector buffer for read and write operations. With the exception of ECC byte

transfers (which, during Read long and Write long commands, are 8 bits wide), data transfers through the

Data register are all 16 bits wide.

Error Register

A read-only register containing specific information regarding the previous command. Data interpretation

differs depending on whether the controller is in operational or diagnostic mode. A power up, reset,

software reset, or receipt of a diagnostic command sets the controller into diagnostic mode. This mode

invalidates contents of the Status register. The contents of the Error register reflect a completion code.

Issuing any command (apart from a Diagnostic command) places the controller into operational mode.

In operational mode, the Error register is valid only when the Error bit in the Status register is set. The bit

definitions for operational mode follow:

ECC

IDNF

ABRT

TK0

AMNF

Interface

CRC

Data

Not

Aborted

Track 0

Error

Address

Mark Not

Found

ECC Error

Used

Not Found

Used

Command

Interface CRC – An interface CRC error occurred during an Ultra DMA transfer.

Data ECC Error – An non-correctable ECC error occurred during a Read Sector command.

Firmware Problem – Indicates a firmware problem was detected, (e.g., invalid interrupt, divide overflow).

ID Not Found – Either a matching ID field not found, or a CRC error occurred.

Aborted Command – Invalid commands, write fault, no seek complete, or drive not ready.

Track 0 Error – Track 0 was not found during execution of a Restore command.

Address Mark Not Found – The Address Mark could not be found after an ID match.

Features Register

Enables or disables features through the Set Features command.

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HOST SOFTWARE INTERFACE

Sector Count Register

Holds the number of sectors to be sent during a Read or Write command, and the number of sectors per

track during a Format command. A value of zero in this register implies a transfer of 256 sectors. A multi-

sector operation decrements the Sector Count register. If an error occurs during such an operation, this

Sector Number Register

Holds the starting sector number for any disk operation. The register is updated as each sector is processed in

a multi-sector operation.

Cylinder Number Registers

Two 8-bit Cylinder Number registers (Low and High) specify the starting cylinder for disk operation.

Device/Head Register

Used to specify the drive and head number to be operated on during any disk operations. Within the

context of a Set Parameters command, this register specifies the maximum number of heads on the drive.

Bit definitions follow:

LBA

DRV

HS3

HS2

HS1

HS0

Drive

Head

Mode

Select

Select LBA Mode – Enabling this bit for commands not supported by LBA mode will abort the selected command. When set,

theTaskFileregistercontentsaredefinedasfollowsfortheRead/Writeandtranslatecommand:

CONTENTS

Sector Number

Cylinder Low

Cylinder High

Drive/Head

LBA BITS

0 - 7

8 - 15

16 - 23

24 - 27

Drive Select – Set to 0 to select the master drive; set to 1 to select the slave drive.

Head Select – Specifies the binary coded address of the head to be selected.

Status Register

Contains results of the last command executed, and the drive’s status. The other seven Task File registers may

be read only when bit 7 (BUSY) of the Status register is low. Reading any of the Task File registers when

BUSY is high returns the value of the Status register. Reading the Status register also clears any interrupt

request to the host. Bit definitions follow:

BUSY

DRDY

DSC

DRQ

ERR

Error

Controller

Busy

Device

Ready

Device

Fault

Device Seek Data

Complete Request

Controller Busy – Goes active when a command is written to the Command register, indicating controller

task execution. After a command, this bit resets.

Device Ready – Indicates that the drive is ready for commands. If drive ready is not present, all commands abort.

Device Fault – Indicates the drive’s detection of a write fault condition, causing all commands to abort.

Device Seek Complete – Signifies a seek completion, and that the drive is on track.

Data Request – Indicates that the drive’s sector buffer is ready for data transfer.

Error – The Error bit sets when the previous command has completed with a non-recoverable error.

6 – 2

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HOST SOFTWARE INTERFACE

CommandRegister

Contains code for the command to be performed. Additional command information should be written to the

task file before the Command register is loaded. When this register is written, the BUSY bit in the Status

commands is given in Section 7.) Hex values for valid command formats follow:

Read Commands

Read Sector(s)

20h

21h

22h

23h

40h

41h

E4h

C4h

Normal reads; retries enabled

Normal reads; retries disabled

Read Long; retries enabled

Read Long; retries disabled

Retries enabled

Read Verify Sector(s)

Retries disabled

Read Sector Buffer

Read Multiple

Read DMA

C8h

C9h

No retries

Write Commands

Write Sector(s)

30h

31h

32h

33h

Normal writes; retries enabled

Normal writes; retries disabled

Write Long; retries enabled

Write Long; retries disabled

Write Verify Sector(s)

Write Sector Buffer

Write Multiple

3Ch

E8h

C5h

CAh

CBh

Write DMA

No retries

Mode Set/Check Commands

Set Features

Set Multiple Mode

EFh

C6h

Power Mode Commands

Standby Immediate

Idle Immediate

Standby

94/E0h Stops drive spindle; do not change time-out value

95/E1h Starts spindle; do not change time-out value

96/E2h Stops spindle; change time-out value

97/E3h Starts spindle; change time-out value

98/E5h

Idle

Check Power Mode

Set Sleep Mode

99/E6h

Initialization Commands

Identify Drive

Initialize Drive Parameters

Re-calibrate

ECh

91h

1xh

Seek, Format, and Diagnostic Commands

Seek

7xh

50h

90h

Format Track

Execute Drive Diagnostic

S.M.A.R.T. Commands

Execute S.M.A.R.T.

B0h

6 – 3

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HOST SOFTWARE INTERFACE

Summary

COMMAND NAME

COMMAND CODE

PARAMETERS USED

SDH

Recalibrate

Read Sector(s)

Read DMA

Write Sector(s)

Write DMA

Write Verify Sector(s)

Read Verify Sector(s)

Format Track

Seek

Execute Diagnostic

Initialize Parameters

Read Sector Buffer

Write Sector Buffer

Identify Drive

Set Features

Read Multiple

Write Multiple

Set Multiple Mode

TIMER VALUE

TIME-OUT PERIOD

Time-out disabled

(value * 5) seconds

1 - 240

241 - 251

252

((value - 240) * 30) minutes

21 minutes

253

Vendor unique period = 10 hours

Reserved

254

255

21 minutes, 15 seconds

6 – 4

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HOST SOFTWARE INTERFACE

ControlDiagnosticRegisters

These I/O port addresses reference three Control/Diagnostic registers:

I/O PORT

3F6h

READ

WRITE

Fixed Disk Control

Not used

Alternate Status

Digital Input

3F7h

Alternate Status Register

Contains the same information as the Status register in the Task File. However, this register may be read at

any time without clearing a pending interrupt.

Device Control Register

Contains the software Reset and Enable bit to enable interrupt requests to the host. Bit definitions follow:

SRST

Reset

IEN

IRQ Enable

Reset – Setting the software Reset bit holds the drive in the reset state. Clearing the bit re-enables the drive.

The software Reset bit must be held active for a minimum of 5 µsec.

IRQ Enable – Setting the Interrupt Request Enable to 0 enables the IRQ 14 signal to the host. When this

bit is set to 1, IRQ14 is tri-stated, and interrupts to the host are disabled. Any pending interrupt occurs when

the bit is set to 0. The default state of this bit after power up is 0 (interrupt enabled).

Digital Input Register

Contains information about the state of the drive. Bit definitions follow:

-WG

-HS3

-HS2

-HS1

-HS0

-DS1

DS0

Reserved

Head

Drive

Gate

Select 3

Select 2

Select 1

Select 0

Select 1

Select 0

Bit 7 of the host data bus is not driven when this register is read.

-Write Gate – Reflects the state of the active low write gate signal on the drive.

-Head Select 3 through -Head Select 0 – Represents the ones complement of the currently selected head number.

-Drive Select 1 – Is 0 if drive 1 selected; 1 otherwise.

-Drive Select 0 – Is 0 if drive 0 selected; 1 otherwise.

6 – 5

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HOST SOFTWARE INTERFACE

ResetandInterruptHandling

Reset Handling

One of three different conditions may cause a reset: power on, hardware reset or software reset. All three

cause the interface processor to initialize itself and the Task File registers of the interface. A reset also causes a

set of the Busy bit in the Status register. The Busy bit does not clear until the reset clears and the drive

completes initialization. Completion of a reset operation does not generate a host interrupt.

Task File registers are initialized as follows:

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Drive/Head

Interrupt Handling

The drive requests data transfers to and from the host by asserting its IRQ 14 signal. This signal interrupts the

host if enabled by bit 1 (IRQ enable) of the Fixed Disk Control register.

Clear this interrupt by reading the Status register, writing the Command register, or by executing a host

hardware or software reset.

6 – 6

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INTERFACE COMMANDS

SECTION 7

InterfaceCommands

The following section describes the commands (and any parameters necessary to execute them),

as well as Status and Error register bits affected.

Read Commands

Read Sector(s)

Read Verify Sector(s)

Read Sector Buffer

Read DMA

Multi-word DMA

Ultra DMA

Read Multiple

Set Multiple

Write Commands

Write Sector(s)

Write Verify Sector(s)

Write Sector Buffer

Write DMA

Multi-word DMA

Ultra DMA

Write Multiple

Set Feature Commands

Set Features Mode

Power Mode Commands

Standby Immediate

Idle Immediate

Standby

Idle

Check Power Mode

Set Sleep Mode

Default Power-on Condition

Initialization Commands

Identify Drive

Initialize Drive Parameters

7 – 1

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INTERFACE COMMANDS

ReadCommands

Read Sector(s)

Reads from 1 to 256 sectors, as specified in the Command Block, beginning at the specified sector. (A sector

count of 0 requests 256 sectors.) Immediately after the Command register is written, the drive sets the BSY

bit and begins execution of the command. If the drive is not already on the desired track, an implied seek is

performed.

Once at the desired track, the drive searches for the data address mark of the requested sector. The data

address mark must be recognized within a specified number of bytes, or the Data Address Mark Not Found

error will be reported. Assuming the data address mark is found:

The data field is read into the sector buffer.

Error bits are set (if an error was encountered).

The DRQ bit is set.

An interrupt is generated.

The DRQ bit is always set, regardless of the presence or absence of an error condition after the sector.

Upon command completion, the Command Block registers contain the numbers of the cylinder, head and

sector of the last sector read. Back-to-back sector read commands set DRQ and generate an interrupt when

the sector buffer is filled at the completion of each sector. The drive is then ready for the data to be read by

the host. DRQ is reset and BSY is set immediately when the host empties the sector buffer.

If an error occurs during Read Sector commands, the read terminates at the sector where the error occurred.

The host may then read the Command Block to determine the nature of that error, and the sector where it

happened. If the error type is a correctable or an non-correctable data error, the flawed data is loaded into

the sector buffer.

A Read Long command sets the Long bit in the command code and returns the data and the ECC bytes in

the data field of the specified sector. During a Read Long, the drive does not check the ECC bytes to

determine if there has been a data error. The Read Long command is limited to single sector requests.

Read Verify Sector(s)

Identical to the Read Sector(s) command, except that:

DRQ is never set,

No data is transferred back to the host and

The long bit is not valid.

7 – 2

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INTERFACE COMMANDS

Read DMA

Multi-word DMA

Identical to the Read Sector(s) command, except that

The host initializes a slave-DMA channel prior to issuing the command,

Data transfers are qualified by DMARQ and are performed by the slave-DMA channel

and

The drive issues only one interrupt per command to indicate that data transfer has

terminated and status is available.

Ultra DMA

With the Ultra DMA Read protocol, the control signal (DSTROBE) that latches data from DD(15:0) is

generated by the devices which drives the data onto the bus. Ownership of DD(15:0) and this data strobe

signal are given DSTROBE to the drive during an Ultra DMA data in burst.

During an Ultra DMA Read burst, the drive always moves data onto the bus, and, after a sufficient time to

allow for propagation delay, cable settling, and setup time, the sender shall generate a DSTROBE edge to

latch the data. Both edges of DSTROBE are used for data transfers.

Any unrecoverable error encountered during execution of a Read DMA command terminates data transfer

after the transfer of all sectors prior to the sector where the error was detected. The sector in error is not

transferred. The drive generates an interrupt to indicate that data transfer has terminated and status is

available. The error posting is identical to the Read Sector(s) command.

Read Multiple

Performs similarly to the Read Sector(s) command, except that for each READ MULTIPLE command data

transfers are multiple sector blocks and the Long bit is not valid.

Execution is also similar to that of the READ SECTOR(S) command, except that:

Several sectors are transferred to the host as a block, without intervening interrupts.

DRQ qualification of the transfer is required only at the start of each block, not of each sector.

The block count consists of the number of sectors to be transferred as a block. (The block count is

programmed by the Set Multiple Mode command, which must be executed prior to the Read Multiple

command.) READ LONG command is limited to single sector requests.

When the Read Multiple command is issued, the Sector Count register contains the number of sectors

requested — not the number of blocks or the block count. If the number of sectors is not evenly divisible

by the block count, as many full blocks as possible are transferred, followed by a final, partial block transfer.

This final, partial block transfer is for N sectors, where N = (sector count) modulo (block count)

The Read Multiple operation will be rejected with an Aborted Command error if attempted:

Before the Set Multiple Mode command has been executed, or

When Read Multiple commands are disabled.

The controller reports disk errors encountered during Read Multiple commands at the start of the block or

partial block transfer. However, DRQ still sets, and the transfer occurs normally, along with the transfer of

any corrupt data. Remaining block data from the following the sector in error is not valid.

If the Sector Count register contains 0 when the Set Multiple Mode command is issued, Read Multiple and

Write Multiple commands are disabled; no error is returned. Once the appropriate action has been taken, the

controller resets BSY and generates an interrupt. At power up, or after a hardware or software reset, Read

Multiple and Write Multiple commands are disabled by default.

7 – 3

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INTERFACE COMMANDS

Set Multiple Mode

Enables the controller to perform Read and Write Multiple operations, and establishes the block count for

these commands. Before issuing this command, the Sector Count register should be loaded with the number

of sectors per block. The drives support block sizes of 2, 4, 8 and 16 sectors.

When this command is received, the controller sets BSY and examines the Sector Count register contents. If

they contain a valid and supported block count value, that value is loaded for all subsequent Read and Write

Multiple commands, and execution of those commands is enabled. An invalid and unsupported block count

in the register results in an Aborted Command error and disallows Read Multiple and Write Multiple

commands.

WriteCommands

Write Sector(s)

Writes from 1 to 256 sectors, beginning at a sector specified in the Command Block. (A sector count of 0

requests 256 sectors.)

When the Command register is written, the drive sets the DRQ bit and waits for the host to fill the sector

buffer with the data to be written. An interrupt is not generated to start the first buffer fill operation.

Once the buffer is full, the drive resets DRQ, sets BSY, and begins command execution. If the drive is not

already on the desired track, an implied seek is performed.

The data loaded in the buffer is written to the data field of the sector, followed by the ECC bytes. Upon

command completion, the Command Block registers contain the cylinder, head and sector number of the

last sector written. The next time the buffer is ready to be filled during back-to-back Write Sector

commands, DRQ is set and an interrupt is generated.

After the host fills the buffer, DRQ is reset and BSY is set. If an error occurs, Write Sector operations

terminate at the sector containing the error.

The Command Block registers then contain the numbers of the cylinder, head and sector where the error

occurred. The host may read the Command Block to determine the nature of that error, and on which

sector it happened. A Write Long may be executed by setting the Long bit in the command code. The

Write Long command writes the data and the ECC bytes directly from the sector buffer; the drive itself does

not generate the ECC bytes. Restrict Write Long commands to PIO Mode 0.

Write Verify Sector(s)

Identical to the Write Sector(s) command, except that the requested sectors are verified immediately after

being written. The verify operation reads (without transferring), and checks for data errors. Any errors

encountered during this operation are reported.

Write Sector Buffer

Allows the host to overwrite the contents of the drive’s sector buffer with a selected data pattern. When this

command is received, the drive:

1. Sets BSY,

2. Sets up the sector buffer for a write operation,

3. Sets DRQ,

4. Resets BSY and

5. Generates an interrupt.

The host may then write up to 256 words of data to the buffer. A disk write task begins to store the host

data to disk. Host write commands continue to be accepted and data transferred to the buffer until either

the write command stack is full or the data buffer is full. The drive may reorder write commands to optimize

drive throughput.

7 – 4

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INTERFACE COMMANDS

Write Multiple

Performs similarly to the Write Sector(s) command, except that:

1. The controller sets BSY immediately upon receipt of the command,

2. Data transfers are multiple sector blocks and

3. The Long bit and Retry bit is not valid.

Command execution differs from Write Sector(s) because:

1. Several sectors transfer to the host as a block without intervening interrupts.

2. DRQ qualification of the transfer is required at the start of the block, not on each sector.

The block count consists of the number of sectors to be transferred as a block and is programmed by the Set

Multiple Mode command, which must be executed prior to the Write Multiple command. When the Write

Multiple command is issued, the Sector Count register contains the number of sectors requested — not the

number of blocks or the block count.

If the number of sectors is not evenly divisible by the block count, as many full blocks as possible are

transferred, followed by a final, partial block transfer. This final, partial block transfer is for N sectors, where

N = (sector count) modulo (block count)

The Write Multiple operation will be rejected with an Aborted Command error if attempted:

1. Before the Set Multiple Mode command has been executed, or

2. When Write Multiple commands are disabled.

All disk errors encountered during Write Multiple commands report after the attempted disk write of the

block or partial block in which the error occurred.

The write operation ends with the sector in error, even if it was in the middle of a block. When an error

occurs, subsequent blocks are not transferred. When DRQ is set at the beginning of each full and partial

block, interrupts are generated.

Write DMA

Multi-word DMA

Identical to the Write Sector(s) command, except that:

The host initializes a slave-DMA channel prior to issuing the command,

Data transfers are qualified by DMARQ and are performed by the slave-DMA channel and

The drive issues only one interrupt per command to indicate that data transfer has terminated

at status is available.

Ultra DMA

With the Ultra DMA Write protocol, the control signal (HSTROBE) that latches data from DD(15:0) is

generated by the devices which drives the data onto the bus. Ownership of DD(15:0) and this data

strobe signal are given to the host for an Ultra DMA data out burst.

During an Ultra DMA Write burst, the host always moves data onto the bus, and, after a sufficient time to

allow for propagation delay, cable settling, and setup time, the sender shall generate a HSTROBE edge to

latch the data. Both edges of HSTROBE are used for data transfers.

Any error encountered during Write DMA execution results in the termination of data transfer. The drive

issues an interrupt to indicate that data transfer has terminated and status is available in the error register.

The error posting is the same as that of the Write Sector(s) command.

7 – 5

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INTERFACE COMMANDS

SetFeatureCommands

Set Features Mode

Enables or disables features supported by the drive. When the drive receives this command it:

1. Sets BSY,

2. Checks the contents of the Features register,

3. Clears BSY and

4. Generates an interrupt.

If the value of the register is not a feature supported by the drive, the command is aborted.

The acceptable values in the Features register are defined as follows:

VALUE

02h*

03h

DESCRIPTION

Enabled write cache

Set transfer mode based on value in Sector Count register

44h

Length of data appended on Read Long/Write Long commands specified in the

Identify Device information

55h

Disable read look-ahead feature

66h*

82h

Disable reverting to power-on defaults

Disable write cache

AAh*

BBh*

CCh

Enable read look-ahead feature

4 bytes of Maxtor specific data appended on Read Long/Write Long commands

Enable reverting to power-on defaults

* Enabled at power up by default.

7 – 6

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INTERFACE COMMANDS

PowerModeCommands

Standby Immediate – 94h/E0h

Spin down and do not change time out value. This command will spin the drive down and cause the drive

to enter the STANDBY MODE immediately. If the drive is already spun down, the spin down sequence is

not executed.

Idle Immediate – 95h/E1h

Spin up and do not change time out value. This command will spin up the spin motor if the drive is spun

down, and cause the drive to enter the IDLE MODE immediately. If the drive is already spinning, the spin

up sequence is not executed. The actuator is parked and some circuits are powered off.

Standby – 96h/E2h

Spin down and change time out value. This command will spin the drive down and cause the drive to enter

the STANDBY MODE immediately. If the drive is already spun down, the spin down sequence is not

executed. A non-zero value placed in the sector count register will enable the Automatic Power Down

sequence. The timer will begin counting down when the drive returns to the IDLE MODE. A value of zero

placed in the sector count register will disable the Automatic Power Down sequence.

Idle – 97h/E3h

Spin up and change time out value. This command will spin-up the spin motor if the drive is spun-down.

If the drive is already spinning, the spin up sequence is not executed. A non-zero value placed in the Sector

Count register will enable the Automatic Power Down sequence and their timer will begin counting down

immediately. A value of zero placed in the Sector Count register will disable the Automatic Power Down

sequence. The actuator is parked and some circuits are powered off.

Check Power Mode – 98h/E5h

This command returns a code in the Sector Count register that determines the current Power Mode status of

the drive. If the drive is in, going to, or recovering from the STANDBY MODE the drive sets the Sector

Count register to OOh. If the drive is in the IDLE MODE or ACTIVE MODE, the drive sets the Sector

Count register to FFh.

Set Sleep Mode – 99h/E6h

This command will spin the drive down and cause the drive to enter the SLEEP MODE immediately. If the

drive is already spun down, the spin down sequence is not executed.

Note: The only way to recover from SLEEP MODE is with a software reset or a hardware reset.

Default Power-on Condition

The drive’s default power on condition is the ACTIVE MODE.

Upon receiving a Power Mode command, except the SLEEP MODE command, the drive sets BSY and

performs the requested power operation. Once the requested Power Mode change has begun, the drive

resets BSY and generates an interrupt - without waiting for the drive to spin up or spin down. Upon

receiving a SLEEP MODE command the drive is spun down, and when it is stopped, the drive resets BSY

and generates an interrupt.

7 – 7

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INTERFACE COMMANDS

When enabling the Automatic Power Down sequence, the value placed in the Sector Count register is

multiplied by five seconds to obtain the Time-out Interval value. If no drive commands are received from

the host within the Time-out Interval, the drive automatically enters the STANDBY mode. The minimum

value is 5 seconds.

TIMER VALUE

TIME-OUT PERIOD

Time-out disabled

(value * 5) seconds

((value - 240) * 30) minutes

21 minutes

1 - 240

241 - 251

252

253

Vendor unique period = 10

hours

254

255

Reserved

21 minutes, 15 seconds

While the drive is in STANDBY MODE, any commands received from the host are accepted and executed

as they would in normal operation, except that the spin motor is started if required to execute a disk

command. Under these conditions, the drive will set BSY when command processing would normally begin

and will leave BSY set until the drive comes up to speed and the disk command can be executed. Disk

commands issued while the drive is in STANDBY MODE, restarts the Time-out Interval after completing

the command. A reset must be issued before attempting to issue any commands while the drive in

SLEEP MODE.

7 – 8

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INTERFACE COMMANDS

InitializationCommands

Identify Drive

Allows the host to receive parameter information from the drive.

When the command is received, the drive:

1. Sets BSY,

2. Stores the required parameter information in the sector buffer,

3. Sets the DRQ bit and

4. Generates an interrupt.

The host may then read the information out of the sector buffer. Parameter words in the buffer follow.

Note that all reserved bits or words should be zeroes.

WORD CONTENT DESCRIPTION

General configuration

15 = device (0 = ATA device, 1 = ATAPI)

14-8 = retired

7, 1 = removable media device

6, 1 = not removable controller and/or device

5-3 = retired

2 = response incomplete

1 = retired

0 = reserved

Number of logical cylinders

Reserved

Number of logical heads

Retired

4-5

Number of logical sectors per logical track

Reserved

7-8

Retired

10 - 19 Drive serial number (20 ASCII characters)

Not used

Buffer size in 512 byte increments (0000h = not specified)

Number of Maxtor specific bytes available on Read/Write Long commands

23 - 26 Firmware revision (8 ASCII characters)

27 - 46 Model number (40 ASCII characters)

Maximum number of sectors that can be transferred per interrupt on read and write multiple commands

Reserved

Capabilities

15 - 14 = reserved

13 = standby timer (1 = values as specified in this standard are supported, 0 = values are Maxtor specific)

12 = reserved (advanced PIO mode support)

11, 1 = IORDY supported, 0 = IORDY may be supported

10, 1 = IORDY can be disabled

9-8 = reserved

7-0 = not used

7 – 9

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INTERFACE COMMANDS

WORD CONTENT DESCRIPTION

Reserved

15-8 = PIO data transfer mode

7-0 = not used

15-8 = DMA data transfer mode

7-0 = not used

15 = reserved

2, 1 = the fields supported in words 88 are valid, 0 = the fields supported in words 88 are not valid

1, 1 = the fields reports in words 64-70 are valid, 0 = the fields reports in words 64-70 are not valid

0, 1 = the fields reports in words 54-58 are valid, 0 = the fields reports in words 54-58 are not valid

Number of current logical cylinders

Number of current logical heads

Number of logical sectors per track

57 - 58 Current capacity in sectors

15-9 = reserved

8, 1 = multiple sector setting is valid

7-0xxh = current setting for number of sectors that can per transferred per interrupt on Read/Write Multiple

command

60 - 61 Total number of user addressable sectors (LBA mode only)

Reserved

15-8 = Multi-word DMA transfer mode active

7-0 = Multi=word DMA transfer modes supported

15-8 = reserved

7-0 = advanced PIO transfer modes supported

Minimum multi-word DMA transfer cycle time (15-0 = cycle time in nanoseconds)

Manufacturer's recommeded multi-word DMA transfer cycle time (15-0 = cycle time in nanoseconds)

Minimum PIO transfer cycle time without flow control (15-0 = cycle time in nanoseconds)

Minimum PIO transfer cycle time with IORDY flow control (15-0 = cycle time in nanoseconds)

69-79 Reserved

15-6 = reserved

5, 1 = supports ATA/ATAPI-5

4, 1 = supports ATA/ATAPI-4

3, 1 = supports ATA-3

2, 1 = supports ATA-2

1, 1 = supports ATA-1

0, reserved

Minor version number

Command set supported. If words 82 and 83 = 0000h or FFFFh command set notification not supported.

15, 1 = supports the Identify Device DMA command

14, 1 = supports the NOP command

13, 1 = supports the Write Buffer command

12, 1 = supports the Read Buffer command

11, 1 = supports the Read Buffer command

10, 1 = supports Host-Protected Area feature set

9, 1 = supports the Device Reset command

8, 1 = supports Service Interupt

7, 1 = supports Release Interupt

6, 1 = supports Look Ahead

5, 1 = supports Write Cache

4, 1 = supports the Packet command feature set

3, 1 = supports the Power Management feature command

2, 1 = supports the Removable feature command

1, 1 = supports the Security featurecommand

0, 1 = supports the SMART feature set

7 – 10

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INTERFACE COMMANDS

WORD CONTENT DESCRIPTION

Command sets supported. If words 82, 83 and 84 = 0000h or FFFFh command set notification not

supported.

15 = shall be cleared to zero

14 = shall be set to one

13-1 = reserved

0, 1 = supports Download Microcode command

Command set extensions supported. If words 84, 85 and 86 = 0000h or FFFFh command set

notification not supported.

15 = shall be cleared to zero

14 = shall be set to one

13-0 = reserved

Command set enabled. If words 84, 85 and 86 = 0000h or FFFFh command set notification not

supported.

15, 1 = Identify Device DMA command enabled

14, 1 = NOP command enabled

13, 1 = Write Buffer command enabled

12, 1 = Read Buffer command enabled

11, 1 = Write Verify command enabled

10, 1 = Host Protected Area feature set enabled

9, 1 = Device Reset command enabled

8, 1 = Service Interrupt enabled

7, 1 = Release Interrupt enabled

6, 1 = Look Ahead enabled

5, 1 = Write Cache enabled

4, 1 = Packet command feature set enabled

3, 1 = Power Mangement feature set enabled

2, 1 = Removable feature set enabled

1, 1 = Security feature set enabled

0, 1 = SMART feature set enabled

Command sets enabled. If words 85, 86 and 87 = 0000h or FFFFh command set notification not

supported.

15 = shall be cleared to zero

14 = shall be set to one

13-1 = reserved

0, 1 = supports Download Microcode command

Command sets enabled. If words 85, 86 and 87 = 0000h or FFFFh command set notification not

supported.

15 = shall be cleared to zero

14 = shall be set to one

13-0 = reserved

Ultra DMA

15-13 Reserved

12 1 = Ultra DMA mode 4 is selected

0 = Ultra DMA mode 4 is not selected

11 1 = Ultra DMA mode 3 is selected

0 = Ultra DMA mode 3 is not selected

10 1 = Ultra DMA mode 2 is selected

0 = Ultra DMA mode 2 is not selected

1 = Ultra DMA mode 1 is selected

0 = Ultra DMA mode 1 is not selected

1 = Ultra DMA mode 0 is selected

0 = Ultra DMA mode 0 is not selected

7-5 Reserved

1 = Ultra DMA mode 4 and below are supported

1 = Ultra DMA mode 3 and below are supported

1 = Ultra DMA mode 2 and below are supported

1 = Ultra DMA mode 1 and below are supported

1 = Ultra DMA mode 0 is supported

127

128

Reserved

Security Status

15-9 Reserved

8 Security Level 0 = High, 1 = Maximum

7-5 Reserved

1 = Security count expired

1 = Security frozen

1 = Security locked

1 = Security enabled

1 = Security supported

129-130 Reserved

131

Spin at power-up, but 0 is asserted when no spin at power-up is enabled.

132-159 Maxtor-specific (not used)

160-255 Reserved

7 – 11

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INTERFACE COMMANDS

Initialize Drive Parameters

Enables the drive to operate as any logical drive type. The drive will always be in the translate mode because

of Zone Density Recording, which varies the number of sectors per track depending on the zone.

Through setting the Sector Count Register and Drive Head Register, this command lets the host alter the

drive's logical configuration. As a result, the drive can operate as any equal to or less than capacity drive type.

Do not exceed the total number of sectors available on the drive:

When this command is executed, the drive reads the Sector Counter Register and the Drive Head Register

(and so determines the number of the logical sectors per track and maximum logical head number per

cylinder and will calculate the number of logical cylinders.)

Upon receipt of the command, the drive:

1. Sets BSY,

2. Saves the parameters,

3. Resets BSY and

4. Generates an interrupt.

To specify maximum heads, write 1 less than the maximum (e.g. write 4 for a 5 head drive). To specify

maximum sectors, specify the actual number of sectors (e.g. 17 for a maximum of 17 sectors/track).

The sector count and head values are not checked for validity by this command. If they are invalid, no error

will be posted until an illegal access is made by some other command.

Moves the read/write heads from anywhere on the disk to cylinder 0.

When this command is received, the drive:

1. Sets BSY and

2. Issues a seek to cylinder zero.

The drive waits for the seek to complete, then the drive:

1. Updates status,

2. Resets BSY and

3. Generates an interrupt.

If the drive cannot reach cylinder 0, the Error bit is set in the Status register, and the Track 0 bit is set in the

Error register.

NOTE: If a maximum head and sector number is selected – such that the number of cylinders will exceed 65,535 – then

the maximum cylinder value will be reduced to 65, 535.

7 – 12

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INTERFACE COMMANDS

Seek,FormatandDiagnosticCommands

Seek

Initiates a seek to the track, and selects the head specified in the Command block.

1. Sets BSY in the Status register,

2. Initiates the Seek,

3. Resets BSY and

4. Generates an interrupt.

The drive does not wait for the seek to complete before returning the interrupt. If a new command is issued

to a drive during the execution of a Seek command, the drive will wait (with BSY active) for the Seek to

complete before executing the new command.

Format Track

Formats the track specified in the Command Block. Shortly after the Command register is written, the drive

sets the bit, and waits for the host to fill the sector buffer with the interleave table. When the buffer is full,

the drive resets DRQ, sets BSY and begins command execution. If the drive is not already on the desired

track, an implied seek is performed. Once at the desired track the data fields are written with all zeroes.

Execute Drive Diagnostic

Commands the drive to implement the internal diagnostic tests. (These tests are executed only upon

command receipt; they do not run automatically at power up or after a reset.)

The drive sets BSY immediately upon receiving this command. The following table presents the codes and

their descriptions. Note that the value in the Error register should be viewed as a unique 8 bit Code.

ERROR CODE

DESCRIPTION

No error detected

Master drive failed

Master and slave drives failed

Slave drive failed

80, 82

Note: If a slave drive fails diagnostics, the master drive OR’s 80h with its own status, and loads that code

into the Error register. If a slave drive passes diagnostics (or a slave is absent), the master drive OR’s 00

with its own status and loads that code into the Error register.

7 – 13

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INTERFACE COMMANDS

S.M.A.R.T.CommandSet

Execute S.M.A.R.T.

The Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.) command has been implemented to

improve the data integrity and data availability of hard disk drives. In some cases, a S.M.A.R.T. capable device

will predict an impending failure with sufficient time to allow users to backup their data and replace the

drive before data loss or loss of service.

The S.M.A.R.T. sub-commands (listed below) comprise the ATA S.M.A.R.T. feature set that provide access

to S.M.A.R.T. attribute values, attribute thresholds and other logging and reporting information.

Prior to writing a S.M.A.R.T. command to the device’s command register, key values must be written by the

host into the device’s Cylinder Low and Cylinder High registers, or the command will be aborted. For any

S.M.A.R.T. sub-command, if a device register is not specified as being written with a value by the host, then

the value in that register is undefined and will be ignored by the device. The key values are:

Key

4Fh

C2h

Cylinder Low (1F4h)

Cylinder High (1F5h)

The S.M.A.R.T. sub-commands use a single command code (B0h) and are differentiated from one another

by the value placed in the Features register. In order to issue a command, the host must write the sub-

command-specific code to the device’s Features register before writing the command code to the command

D0h

D1h

D2h

S.M.A.R.T. Read Attribute Value

This feature returns 512 bytes of attribute information to the host.

S.M.A.R.T. Read Attribute Thresholds

This feature returns 512 bytes of warranty failure thresholds to the host.

Enable/Disable Autosave

To enable this feature, set the sector count register to F1h (enable) or 0 (disable). Attribute values

are automatically saved to non-volatile storage on the device after five minutes of idle time and

before entering idle, sleep or standby modes. This feature is defaulted to “enabled” when

S.M.A.R.T. is enabled via the S.M.A.R.T. Enable Operations commands. The autosave feature

will not impact host system performance and does not need to be disabled.

D3h

D4h

S.M.A.R.T. Save Attribute Value

This feature saves the current attribute values to non-volatile storage.

Perform Off-Line Data Collection

Data is collected from random seeks, timed pattern seek times and head margin tests.

D8h

D9h

DAh

Enable S.M.A.R.T.

Disable S.M.A.R.T.

S.M.A.R.T. Return Status

This feature allows the host to assess the status of a S.M.A.R.T. capable device by comparing all

saved attribute values with their corresponding warranty failure thresholds. If no thresholds are

exceeded, the drive is declared to have a positive health status. If any warranty failure threshold is

exceeded, the drive is declared to have a negative health status. Executing this sub-command

results in all attribute values being saved to non-volatile storage on the device.

DBh

Enable/Disable Automatic Off-Line

To enable this feature, set the Sector Count register to F1h or 0 to disable.

7 – 14

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SERVICE AND SUPPORT

SECTION 8

ServiceandSupport

ServicePolicy

If a customer discovers a defect in a DiamondMax^®Plus 40 drive, Maxtor will, at its option, repair or replace

the disk drive at no charge to the customer, provided it is returned during the warranty period. Drives must be

properly packaged in Maxtor packaging or Maxtor-approved packaging to obtain warranty service. Any

unauthorized repairs or adjustments to the drive void the warranty.

To consistently provide our customers with the best possible products and services, Maxtor developed the

Total Customer Satisfaction (TCS) program. Through the ongoing TCS process, Maxtor employees take

direct responsibility for every customer’s level of satisfaction – with Maxtor technology, price, quality,

delivery, service and support.

NoQuibble^®Service

Another TCS feature is Maxtor’s No Quibble^®Service policy. By minimizing paperwork and processing,

No Quibble Service dramatically cuts the turnaround time normally required for repairs and returns.

Here’s how it works:

1. Customer calls 1-800-2MAXTOR for a Return Material Authorization (RMA) number

and provides a credit card number,

2. Maxtor ships a replacement drive within 2 business days, and

3. Customer returns the original drive and credit card draft is destroyed.

Support

Technical Assistance

Highly-trained technicians are available 6 a.m. to 6 p.m. (Mountain Standard Time) Monday through Friday

to provide detailed technical support.

U.S. and Canada

Language support: English, Spanish

800-2MAXTOR, press 1 (800-262-9867)

[email protected]

303-678-2260

Voice

E-mail

Fax

Outside U.S. and Canada

303-678-2015

Europe

Voice

E-mail

Fax

Language support: English, French, German

+ 353 1 286 62 22

[email protected]

+ 353 1 286 45 77

Asia/Pacific

Voice

Contact your local Maxtor Sales Office for assistance

[email protected]

Language support: English

E-mail

MaxInfo Service

Use a touch-tone phone to listen to technical information about Maxtor products and the top Q&A’s

from our 24-hour automated voice system.

U.S. and Canada

800-2MAXTOR (800-262-9867)

Press 1, wait for announcement, listen for option

303-678-2015, listen for option

Outside U.S. and Canada

8 – 1

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SERVICE AND SUPPORT

MaxFax^™Service

Use a touch-tone phone to order Technical Reference Sheets, Drive Specifications, Installation Sheets and other

documents from our 24-hour automated fax retrieval system. Requested items are sent to your fax machine.

U.S. and Canada

Phone

Outside U.S. and Canada

Europe

Language support: English

800-2MAXTOR, listen for option (800-262-9867)

303-678-2618

Language support: English, French, German

+ 353 1 204 11 22

Phone

Asia/Pacific

Phone

Language support: English

+ 61 2 9369 4733

Internet

Browse the Maxtor home page on Internet, download files from our FTP site.

Home Page

http://www.maxtor.com

Customer Service

All Maxtor products are backed by No Quibble^®Service, the benchmark for service and support in the industry.

Customer Service is available 5 a.m. to 5 p.m. (Pacific Standard Time) Monday through Friday.

U.S. and Canada

Voice

Language support: English, Spanish

800-2MAXTOR, press 2 (800-262-9867)

[email protected]

E-mail

Fax

408-922-2085

Europe

Voice

Language support: English, French, German

+ 353 1 286 62 22

E-mail

Fax

[email protected]

+ 353 1 286 14 19

Asia/Pacific

Call Singapore Customer Service from the countries listed below.

Customer Service is available 8 a.m. to 5:30 p.m. ^{(Singapore time is GMT +8).}

From

Dial

Australia

1-800-124-328

+800-96-3387

+001-803-65-6500

+0031-65-3616

+0078-65-800-6500

1-800-1126

Hong Kong

Indonesia

Japan

South Korea

Malaysia

New Zealand

Singapore

Taiwan

+0800-44-6542

1-800-481-6788

+0080-65-1062

+001-800-65-6500

Thailand

8 – 2

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GLOSSARY

Glossary

BPI

Acronym for bits per inch. See bit density.

BLOCK

ACCESS

A group of bytes handled, stored, and accessed as a logical data

unit, such as an individual file record.

To obtain data from, or place data into, RAM, a register, or data

storage device.

BUFFER

ACCESSTIME

A temporary data storage area that compensates for a difference in

data transfer rates and/or data processing rates between sender

and receiver.

The interval between the issuing of an access command and the

instant that the target data may be read or written. Access time

includes seek time, latency and controller overhead time.

BUS

ADDRESS

collection of functionally parallel conductors that forms an

A number, generally binary, distinguishing a specific member of an

ordered set of locations. In disk engineering, the address may

consist of drives (unit address), radial positions (cylinder address),

or circumferential position (sector address).

interconnection between functional blocks in

length of parallel conductors that forms major interconnection

route between the computer system CPU (central processing unit)

and its peripheral subsystems. Depending on its design, a bus may

carry data, addresses, power, and more.

digital device.

ALLOCATION

A process of assigning designated areas of the disk to particular

files.

BYTE

An ordered collection of bits treated as a unit. Most often, a byte is

understood to consist of eight bits. One byte is necessary to define

an alphanumeric character.

ALTERNATETRACK

A spare track used in the event that a normal track becomes

damaged or is unusable.

ANALOG

A signal or system that does not use digital states to convey

information. A signal may have any number of significant states

(values), contrasted to digital signals which can only have two

states.

CACHE

Random access memory (RAM) used as a buffer between the CPU

and the disk drive.

ANSI

CAPACITY

American National Standards Institute.

The amount of data, usually expressed in bytes, which can be stored

in a given device or portion of same.

APPLICATIONPROGRAM

A sequence of programmed instructions that tell the computer how

to perform some end-user task, such as accounting or word

processing.

CENTRALPROCESSINGUNIT(CPU)

The heart of the computer system that executes programmed

instructions. It includes the arithmetic logic unit (ALU) for performing

all math and logic operations, a control section for interpreting and

executing instructions, internal memory for temporary storage of

program variables and other functions.

AREALDENSITY

Bit density (bits per inch) multiplied by track density (tracks per inch)

or bits per square inch.

CHANNEL

A collection of electronic circuits used in the process of writing and

reading information to and from magnetic media.

ASYMMETRY

A distortion of the readback signal which is shown in different

intervals between the positive and negative voltage peaks.

CHARACTER

An ordered collection of bits representing one of a set of

predefined symbols. Often the term is used interchangeably with

byte, but this is inexact.

AUXILIARYMEMORY

Memory other than main memory; generally a mass-storage

subsystem containing disk drives and backup tape drives,

controller(s) and buffer memory (also called peripheral memory).

CLOSEDLOOP

control technique that enables the positioning system to correct

AVERAGEACCESSTIME

off-track errors in real time. The actual head position is monitored

and compared to the ideal track position to determine any position

error that might be occurring. This information is then used to

The average time to make all possible length accesses (seeks).

AVERAGESEEKTIME

produce

correction signal (feedback) that goes to the positioner

The average time to make all possible length seeks. A typical

measure of performance.

to correct the error. (See also track following servo).

CLOSEDLOOPSERVO

servo control technique that uses position feedback to correct

off-track errors. See Track Following Servo.

BADBLOCK

CLUSTER

A block that cannot store data because of a media flaw.

The smallest allocatable unit of disk storage allowed by MS-DOS;

each FAT entry represents one cluster.

BIT

An abbreviation for binary digit, of which there are two (0 and 1). A

bit is the basic data unit of most digital computers. A bit is usually

part of a data byte or word, but bits may be used singly to control or

read logic “on-off” functions. The fundamental unit information,

often used loosely to refer to a circuit or magnetization state at a

particular instant in time.

CONTROLLER

An electronic device for connecting one or more mass storage

peripherals (rigid disk drives, tape drives, and optical disk drives) to

the input/output circuits of a host computer. Controllers vary in

complexity, with more sophisticated units able to buffer and

schedule commands, correct data errors, and bypass media defects

without host intervention.

BIOS

Acronym for Basic Input/Output System. The firmware area of a CPU

that controls operations through the system bus and to the

attached cards and peripheral devices.

GL – 1

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GLOSSARY

CONTROLLER

DIGITALMAGNETICRECORDING

A miniature CPU dedicated to controlling a peripheral device, such

as a disk drive, tape drive, video display terminal, or printer. The

controller executes commands from the central processing unit and

reissues commands to the peripheral device.

See magnetic recording.

DIRECTACCESS

Access directly to memory location. (See random access).

CORRECTABLEERROR

DIRECTMEMORYACCESS

An error that can be overcome by the use of Error Detection and

Correction.

A mean of data transfer between the device and host memory

without processor intervention.

CYLINDER

DIRECTORY

On several disk surfaces sharing a common rotational axis, the

aggregate of tracks at a given radial position. A set of disk tracks

that are simultaneously under the set of read/write heads. This

A listing of files maintained by the disk operation system (DOS) or a

data base management system to enable a user to quickly access

data files.

three-dimensional storage volume can be accessed after

seek.

single

DISK

A flat, circular piece of metal (usually aluminum) or plastic (usually

mylar) with a magnetic coating upon which information can be

recorded. (See, for example, floppy disk or Winchester disk)

CYLINDERZERO

The outermost cylinder in a drive that can be used for data storage.

DISKDRIVEORDISKMEMORYDEVICE

The total electromechanical storage device containing disks and

read/write heads, head positioning mechanism, drive motor, and

electronics.

DATA

An ordered collection of information. In a specific case, it is the

DISKPACK

information processed by

computer.

A number of metal disks packaged in a canister for removal from the

disk drive (predecessor of Winchester technology).

DATASEPARATOR

An electronic circuit which decodes playback data and produces

separate clock and data bits. Sometimes incorrectly used to denote

data synchronizer.

DISKOPERATINGSYSTEM(DOS)

The master computer system program that schedules tasks,

allocates the computer system resources, controls accesses to

mass storage devices, manages files, and so forth. Typical disk

operating systems include CP/M, MS-DOS, and UNIX.

DATASYNCHRONIZER

An electronic circuit producing a clock signal that is synchronous

with the incoming data stream. This clock signal is then used to

decode the recording code being used into user data.

DISKSTORAGE

Auxiliary memory system containing disk drives.

DATATRANSFERRATE

DISKTRANSFERRATE

In a disk or tape drive, the rate at which data is transferred to or

from the storage media. It is usually given in thousands of bits per

second (Kbit/second) or millions of bits per second (Mbit/second).

The rate that digital data is transferred from one point to another.

Expressed in either bits/second or bytes/second.

DOUBLEFREQUENCYENCODING

DEDICATEDLANDINGZONE

Another name for FM encoding. This is because all possible data

combinations will result in only two possible temporal displacements

of adjacent data bits, specifically “1F” and 2F.”

A designated radial zone on the disk where contact starting and

stopping occur by design.

DEDICATEDSERVO

A servo scheme in which a prerecorded pattern on an otherwise

unused disk surface provides position information to the servo

circuitry by means of a head reading that surface.

EARLYWINDOW

DEFECT

A data window that has been intentionally shifted in time in an early

direction.

A magnetic imperfection in a recording surface.

DEFECTMANAGEMENT

EMBEDDEDSERVO

A general methodology of avoiding data errors on a recording

surface by avoiding the use of known bad areas of media. Usually

defective sectors or tracks are retired and data are written in

alternate locations. Several algorithms are possible such as “sector

slipping,” or “spare sector per track.”

A servo technique used for track following. Position information is

prerecorded between data areas in a track so that a data head, and

proper additional circuitry, can determine the data head location

with respect to the center position of the track (or cylinder) in

question.

DEFECTMAP

ERASE

A list of defects that fall within a pass/fail criteria of a user. This list

is usually used by an operating system or a disk drive controller for

defect management.

A process by which a signal recorded on a medium is removed and

the medium made ready for rerecording.

ERRORCORRECTIONCODE(ECC)

DEFECTSKIPPING

A mathematical algorithm that can detect and correct errors in a

data field. This is accomplished with the aid of Check Bits added to

the raw data.

A defect management scheme for avoiding surface defects. It has

data written before and after the defect, instead of using alternate

tracks or sectors to avoid use of the defective area.

ERRORFREE

DENSITY

A recording surface that has no defects.

Generally, recording density. See areal, bit, and storage density.

ERRORRATE

DCERASE

The number of errors (type must be specified) that occur in a

specified number of bits read.

The method of erasing a track using a DC write/erase current

through either

Read/Write or Erase head.

ERRORRECOVERYPROCEDURE

DIGITAL

The process that occurs in response to a data error. In a drive

without ECC, this would include re-calibration and re-seeking to the

specified track and rereading the specified data.

Any system that processes digital binary signals (having only values

of a 1 or 0; usually in bits and bytes) rather than analog signals

(signals that can have many values)

GL – 2

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GLOSSARY

EXTRAPULSE

HEADDISKASSEMBLY(HDA)

Term used in surface certification. It is when a flux field

discontinuity remains after the recording surface is erased, thereby

producing an electrical output of a read head passing over the area

with the discontinuity. An extra pulse occurs when the electrical

output is larger than a specified threshold.

The mechanical portion of a rigid, fixed disk drive. It usually includes

disks, heads, spindle motor, and actuator.

HEADLOADINGZONE

The non-data area on the disk set aside for the controlled takeoff

and landing of the Winchester heads when the drive is turned on

and off. Dedicated annulus on each disk surface in which heads are

loaded, unloaded, or flying height is established. Head-disk contact

may occur in some instances; no data is recorded in this area.

FEEDBACK

HEADPOSITIONER

In a closed-loop system, the output signal (from the servo head) is

used to modify the input signal (to the positioner).

Also known as actuator, a mechanism that moves the arms that carry

read/write heads to the cylinder being accessed.

FETCH

read operation and its related data transfer operations.

FILEALLOCATIONTABLE(FAT)

Allocates space on the disk for files, one cluster at a time; locks out

unusable clusters; identifies unused (free) area; and lists a file’s

location. With two FAT’s present, the second copy ensures

consistency and protects against loss of data if one of the sectors

on the first FAT is damaged.

INDEX

Similar to a directory, but used to establish a physical to logical

cross reference. Used to update the physical disk address (tracks

and sectors) of files and to expedite accesses.

INSIDEDIAMETER

FLUXCHANGESPERINCH

The smallest radial position used for the recording and playback of

flux reversals on a magnetic disk surface.

Synonymous with frpi (flux reversals per inch). Only in MFM recording

does 1 fci equal 1 bpi (bit per inch). In run-length-limited encoding

schemes, generally 1 fci equals 1.5 bpi.

INITIALIZATION

Applying input patterns or instructions to a device so that all

operational parameters are at a known value.

FORMAT

In a disk drive, the arrangement of data on a storage media. A

standard 5.25-inch disk format consists of 17, 26, or 36 sectors per

track, and 512 bytes of data per sector, plus identification, error

correction, and other bytes necessary for accessing and

synchronizing data.

INPUT

Data entering the computer to be processed; also user commands.

INPUT/OUTPUT(I/O)

The process of entering data into or removing data from a computer

system or a peripheral device.

FORMATTEDCAPACITY

The actual capacity available to store data in a mass storage

device. The formatted capacity is the gross capacity, less the

capacity taken up by the overhead data used in formatting the

sectors.

INTELLIGENTPERIPHERAL

A peripheral device that contains a processor or microprocessor to

enable it to interpret and execute commands.

FREQUENCYMODULATION

INTERFACE

A recording code. A flux reversal at the beginning of a cell time

represents clock bit; a “1” bit is a flux reversal at the center of the

cell time, and a “0” bit is an absence of a flux reversal.

The data transmitters, data receivers, logic, and wiring that link one

piece of computer equipment to another, such as a disk drive to a

controller or a controller to a system bus.

FREQUENCYRESPONSE

INTERFACESTANDARD

A measure of how effectively a circuit or device transmits the

different frequencies applied to it. In disk and tape drives this refers

to the read/write channel. In disk drives, it can also refer to the

The interface specifications agreed to by various manufacturers to

promote industry-wide interchangeability of products such as

disk

drive. Interface standards generally reduce product costs, allows

buyers to purchase from more than one source, and allow faster

market acceptance of new products.

dynamic mechanical characteristics of

positioning system.

INTERLEAVE

An ordering of physical sectors to be skipped between logical

sectors on your hard disk.

GIGABYTE(GB)

One billion bytes (one thousand megabytes) or 10⁹.

I/OPROCESSOR

Intelligent processor or controller that handles the input/output

operations of

computer.

INTERRUPT

HARDERROR

A signal, usually from a subsystem to a central processing unit, to

signify that an operation has been completed or cannot be

completed.

An error that is not able to be overcome by repeated readings and

repositioning means.

HARDSECTORED

A technique where a digital signal indicates the beginning of a

sector on a track. This is contrasted to soft sectoring, where the

controller determines the beginning of a sector by the reading of

format information from the disk.

JUMPER

A small piece of plastic that slides over pairs of pins that protrude

from the circuit board on the hard drive to make an electrical

HEAD

connection and activate

specific option.

The electromagnetic device that write (records), reads (plays back),

and erases data on a magnetic media. It contains a read core(s)

and/or a write core(s) and/or erase core(s) which is/are used to

produce or receive magnetic flux. Sometimes the term is all inclusive

to mean the carriage assembly which includes the slider and flexure.

KILOBYTE(KB)

HEADCRASH

A unit of measure of approximately 1,000 bytes. (However, because

computer memory is partitioned into sizes that are a power of two, a

kilobyte is really 1,024 bytes.)

The inadvertent touching of a disk by a head flying over the disk

(may destroy a portion of the media and/or the head).

GL – 3

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GLOSSARY

MODIFIEDMODIFIEDFREQUENCYMODULATION(MMFM)

A recording code similar to MFM that has a longer run length limited

distance.

LANDINGZONEORLZONE

MODULATION

The cylinder number to where ParkHeads move the read/write heads.

1. Readback voltage fluctuation usually related to the rotational

period of a disk. 2. A recording code, such as FM, MFM, or RLL, to

translate between flux reversals and bits or bytes.

LATEBIT

A bit that is in the late half of the data window.

LATEWINDOW

A data window that has been shifted in a late direction to facilitate

data recovery.

NON-RETURNTOZERO

A form of data encoding that is not self-clocking, in other words, it

needs to be provided with an external bit cell clock signal. Generally

used in higher-performance disk drives.

LATENCY

A delay encountered in a computer when waiting for a specific

response. In a disk drive there is both seek latency and rotational

latency. The time required for the addressed sector to arrive under

the head after the head is positioned over the correct track. It is a

result of the disk’s rotational speed and must be considered in

determining the disk drive’s total access time.

OFF-LINE

LOGIC

processing or peripheral operations performed while disconnected

from the system CPU via the system bus.

Electronic circuitry that switches on and off (“1” and “0”) to perform

functions.

ON-LINE

LOGICALADDRESS

processing or peripheral operations performed while disconnected

from the system CPU via the system bus.

A storage location address that may not relate directly to a physical

location. Usually used to request information from a controller,

which performs a logical to physical address conversion, and in turn,

retrieves the data from a physical location in the mass storage

peripheral.

OPENLOOPSERVO

A head positioning system that does not use positional information

to verify and correct the radial location of the head relative to the

track. This is usually achieved by use of a stepper motor which has

predetermined stopping point that corresponds to track locations.

LOGICALBLOCKADDRESSING

Defines the addressing of the device by the linear mapping of

sectors.

OPERATINGSYSTEM

A software program that organizes the actions of the parts of the

computer and its peripheral devices. (See disk operating system.)

LOGICALSECTOR

The lowest unit of space that DOS can access through a device

driver; one or more physical sectors.

OUTSIDEDIAMETER

The largest radius recording track on a disk.

LOWFREQUENCY

The lowest recording frequency used in

particular magnetic

OVERWRITE

recording device. With FM or MFM channel codes, this frequency is

also called “IF.”

A test that measures the residual 1F recorded frequency on a track

after being overwritten by a 2F signal. Variations of the test exist.

MAINMEMORY

PARALLELISM

Random-access memory (RAM) used by the central processing unit

(CPU) for storing program instructions and data currently being

processed by those instructions. (See also random access memory.)

1. The condition of two planes or lines being parallel. Important in

disk drives because a lack of it in mechanical assemblies can result

in positioning inaccuracy. More precisely: planes-coplanar; lines-

colinear. 2. Is the local variation in disk thickness measured

independently of thickness itself. 3. The ability of a multiprocessor

computer to allocate more than one processor (CPU) to a computing

problem, where each CPU works on a separate problem or separate

segment of that problem. Also referred to as parallel processing.

MASSSTORAGE

Auxiliary memory used in conjunctions with main memory; generally

having

large, on-line storage capacity.

MEGABYTE(MB)

A unit of measure approximately one million bytes (actually 1,048,576

bytes) or 10⁶.

PARITY

A simple method of data error detections that always makes numbers

either odd or even, using an extra bit in which the total number of

binary 1s (or 0s) in a byte is always odd or always even; thus, in an

odd parity scheme, every byte has eight bits of data and one parity

bit. If using odd parity and the number of 1 bits comprising the byte

of data is not odd, the ninth or parity bit is set to 1 to create the odd

parity. In this way, a byte of data can be checked for accurate

transmission by simply counting the bits for an odd parity indication.

If the count is ever even, an error is indicated.

MEMORY

Any device or storage system capable of storing and retrieving

information. (See also storage definitions.)

MICROCOMPUTER

A computer whose central processing unit is a microprocessor. It is

usually, but not necessarily, desktop size.

MICROPROCESSOR

PARTITION

A central processing unit (CPU) manufactured as a chip or a small

number of chips.

A logical section of a disk drive, each of which becomes a logical

device with a drive letter.

MISSINGPULSE

PEAKSHIFT

A term used in surface certification. It is when a prerecorded signal

The shifting in time of the zero-slope portion of a readback voltage

from the values contained in the write current waveform. Sometimes

incorrectly used to describe bit jitter.

is reduced in amplitude by

certain specified percentage.

MODIFIEDFREQUENCYMODULATION(MFM)

A method of encoding digital data signals for recording on magnetic

media. Also called “three frequency recording.” Recording code

that only uses synchronizing clock pulse if data bits are not present.

Doubles the lineal bit density without increasing the lineal flux

reversal density, compared to Frequency Modulation.

PERIPHERALEQUIPMENT

Auxiliary memory, displays, printers, and other equipment usually

attached to a computer system’s CPU by controllers and cables.

(They are often packaged together in

desktop computer.)

PHASELOCKEDLOOP(PLL)

A circuit whose output locks onto and tracks the frequency of an

input signal. Sometimes incorrectly called

data separator.

GL – 4

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GLOSSARY

PHASEMARGIN

Measure in degrees of the amount of difference between

excursions from the window center where flux reversals can occur

and the edge of the data window. Similar to window margin.

SECTOR

A logical segment of information on a particular track. The smallest

addressable unit of storage on a disk. Tracks are made of sectors.

PHYSICALSECTOR

The smallest grouping of data on the hard disk; always 512 bytes.

SECTORPULSESIGNAL

PIO

A digital signal pulse present in hard sectored drives which

Programmable Input Output. A means of accessing device registers.

Also describes one form of data transfers. PIO data transfers are

performed by the host processor using PIO register accesses to the

data register.

indicates the beginning of

other prerecorded information may be present on the disk when

sector is active.

sector. Embedded servo pattern or

SEEK

A random access operation by the disk drive. The act of moving a set

of read/write heads so that one of them is over the desired cylinder.

The actuator or positioner moves the heads to the cylinder

containing the desired track and sector.

PLATEDTHINFILMMEDIA

Magnetic disk memory media having its surface plated with a thin

coating of a metallic alloy instead of being coated with oxide.

PROCESSING

SEEKCOMPLETESIGNAL

The process of the computer handling, manipulating and modifying

data such as arithmetic calculation, file lookup and updating, and

word pressing.

A digital signal level which indicates that the positioner is not

moving and is located over a cylinder or offset position.

SEEKTIME

PULSECROWDING

The amount of time between when a step pulse or seek command is

issued until the head settles onto the desired cylinder. Sometimes is

measured without settling times.

Modification of playback amplitude due to super-positioning of

adjacent flux reversal fields being sensed by the read/write gap.

PULSEDETECT

SEQUENTIALACCESS

A digital pulse train in which each leading edge or each edge

corresponds to a magnetic transition read from the disk. If transition

qualification circuitry exists in the drive, this signal is the output of

same. Also known as transition detect.

The writing or reading of data in a sequential order such as reading

data blocks stored one after the other on magnetic tape. This is

contrasted to random access of information.

SERVOBURST

A momentary servo pattern used in embedded servo control systems

usually positioned between sectors or at the end of a track.

RANDOMACCESSMEMORY(RAM)

SERVOCONTROL

Memory designed so that any storage location can be accessed

randomly, directly and individually. This is contrasted to sequential

access devices such as tape drives.

A technique by which the speed or position of a moving device is

forced into conformity with a desired or standard speed or position.

SERVOHEAD

READ

magnetic head designed specifically for accurately reading servo

To access

storage location and obtain previously recorded data.

data.

To sense the presence of flux reversals on magnetic media. Usually

implemented such that a dynamic flux amplitude will cause a

proportional electrical output from the transducer.

SERVOPATTERN

A readback signal that indicates the position of a head relative to a

track.

READGATESIGNAL

A digital input signal which causes the drive circuitry to recover

data.

SERVOSURFACE

A recording surface in a multi-surface disk drive that only contains

control information which provides timing, head position, and track-

following information for the data surfaces.

READONLYMEMORY(ROM)

A form of memory which cannot be changed in formal operational

modes. Many different types are available. RAM is used for

permanent information storage. Computer control programs are

often stored in ROM applications.

SERVOSYSTEM

An automatic system for maintaining the read/write head on track;

can be either “open loop,” “quasi-closed loop,” or “closed loop.”

READ/WRITEHEAD

SERVOTRACK

The recording element which writes data to the magnetic media and

reads recorded data from the media.

A track on a servo surface. The prerecorded reference track on the

dedicated servo surface of a disk drive. All data track positions are

compared to their corresponding servo track to determine “off

track”/”on track” position.

RE-CALIBRATE

The action of moving the head of a disk drive to cylinder zero.

SETTLINGTIME

RECOVERABLEERROR

The time it takes a head to stop vibrating, within specified limits,

after it reaches the desired cylinder.

A read error, transient or otherwise, falling within the capability of

an ECC mechanism to correct, or able to overcome by rereading the

data in question.

SILICON

Semiconductor material generally used to manufacture

microprocessors and other integrated circuit chips.

ROTATIONALLATENCY

The amount of delay in obtaining information from a disk drive

attributable to the rotation of the disk.

SMALLCOMPUTERSYSTEMINTERFACE(SCSI)

An intelligent interface that incorporates controller functions

directly into the drive.

RUN-LENGTHLIMITED

An encoding process that repositions data bits and limits the length

of zero bits in order to compress information being stored on disks.

S.M.A.R.T.CAPABILITY

Self-Monitoring Analysis and Reporting Technology. Prediction of

device degradation and/or faults.

RUN-LENGTHLIMITEDENCODING

A recording code. Sometimes meant to denote “2.7 RLL” which can

signify 1.5 times the bits as MFM, given the same number of flux

reversals in a given lineal distance.

GL – 5

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GLOSSARY

SOFTERROR

UN-CORRECTABLEERROR

A data error which can be overcome by rereading the data or

repositioning the head.

An error that is not able to be overcome with Error Detection and

Correction.

SOFTSECTORED

UNFORMATTEDCAPACITY

A technique where the controller determines the beginning of a

sector by the reading of format information from the disk. This is

contrasted to hard sectoring where a digital signal indicates the

beginning of a sector on a track.

Storage capacity of disk drive prior to formatting; also called the

gross capacity. (See format.) The raw capacity of a drive not taking

into account the capacity loss due to storage of the format control

information on the disk surfaces.

SOFTWARE

UNRECOVERABLEERROR

Applications programs, operating systems, and other programs (as

opposed to hardware).

A read error falling outside the capability of an ECC mechanism to

correct, or not able to be overcome by rereading the data in

question, with or without repositioning the head.

SPINDLE

The rotating hub structure to which the disks are attached.

SPINDLEMOTOR

The motor that rotates the spindle and therefore the disks.

VOICECOILMOTOR

A positioning motor that uses the same principle as a voice coil in a

loudspeaker. The motor has no detent positions. The mechanical

motion output of it can be either rotary or linear.

SPUTTEREDMEDIA

Magnetic disk or tape that has the magnetic layer deposited by

sputtering means.

STEPPERMOTOR

A motor that has known detent positions where the rotor will stop

with the proper control in some cases. The digitally controlled motor

moves the head positioner from track to track in small, step-like

motions.

WHITNEYHEAD

A successor to the original Winchester read/write head design. The

primary change was to make the flexure smaller and more rigid. First

used in IBM 3370/3380.

STORAGECAPACITY

The amount of data that can be stored in a memory location, usually

specified in kilobytes for main memory and floppy drives and

megabytes for mass storage devices.

WHITNEYTECHNOLOGY

A method of constructing a read/write head in a rigid disk drive

using a Whitney head. In all other details it is the same as

Winchester technology.

STORAGEDENSITY

Usually refers to recording density (BPI, TPI, or a combination of the

two.)

WINCHESTERHEAD

The read/write head used in Winchester technology, non-removable

media disk drives. May be either a monolithic or composite type. It is

aerodynamically designed to fly within microinches of the disk

surface.

STORAGELOCATION

A memory location, identified by an address where information may

be read or written.

STROBEOFFSETSIGNAL

WINCHESTERTECHNOLOGY

A group of digital input signal levels which cause the read PLL and/

or data decoder to shift the decoding windows by fractional

amounts. Often early/late are modified when two signals are used.

A method of constructing a rigid disk drive using concepts

introduced in the IBM model 3340 disk drive. The primary changes

from prior technology was to lower the mass of the slider, use of a

monolithic slider, radically changing the design of the flexure and

having the slider come to rest on a lubricated disk surface when disk

rotation ceases. In addition to the above, a totally sealed chamber

containing the read/write heads and disks was used to protect

against contamination.

THIN-FILMHEAD

magnetic transducer manufactured by deposition of magnetic and

WINDOWMARGIN

electrical materials on a base material contrasted with prior art

mechanical methods. Read/write heads whose read/write element is

deposited using integrated circuit techniques rather than being

manually wound.

The amount of tolerance a read/write system has for transition jitter

at a specified error rate level.

WORD

A number of bits, typically a multiple of eight, processed in parallel

(in a single operation). Standard word lengths are 8, 16, 32 and 64

bits (1, 2, 4, or 8 bytes).

THIN-FILMMEDIA

See plated thin film media.

TRACK

WRITE

One surface of a cylinder. A path which contains reproducible

information left on a magnetic medium by recording means

The recording of flux reversals on a magnetic media.

energized from

single channel.

WRITEPRE-COMPENSATION

The intentional time shifting of write data to offset the effects of bit

shift in magnetic recording.

TRACK-FOLLOWINGSERVO

closed-loop positioner control system that continuously corrects

the position of the disk drive’s heads by utilizing a reference track

and a feedback loop in the head positioning system. (See also

closed loop.)

WRITEGATESIGNAL

A digital input signal level which causes the drive circuitry to record

(write) data.

TRACKSPERINCH(TPI)

A measurement of radial density. Tracks per inch of disk radius.

TRACKPOSITIONING

The method, both mechanical and electrical, used to position the

heads over the correct cylinder in a disk drive system.

GL – 6

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