. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
U4 Family
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST32112A, ST34311A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST36421A, ST38421A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ultra ATA Interface Drives
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Manual
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
U4 Family
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST32112A, ST34311A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST36421A, ST38421A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ultra ATA Interface Drives
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Manual
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1999 Seagate Technology, Inc. All rights reserved
Publication Number: SG35116-001, Rev. D, June 1999
Seagate, Seagate Technology, the Seagate logo and U4 are either
trademarks or registered trademarks of Seagate Technology, Inc. Other
product names are registered trademarks or trademarks of their owners.
Seagate reserves the right to change, without notice, product offerings
or specifications. No part of this publication may be reproduced in any
form without written permission from Seagate Technology, Inc.
U4 Family Product Manual, Rev. D
iii
Contents
Specification summary table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1.1 Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Physical organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Recording and interface technology . . . . . . . . . . . . . . . . . . . . 6
1.4 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5 Seek time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.6 Start/stop times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.7 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.7.1 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.7.2 Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.7.3 Voltage tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.7.4 Power-management modes . . . . . . . . . . . . . . . . . . . . . 10
1.8 Environmental tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.8.1 Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.8.2 Temperature gradient . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.8.3 Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.8.4 Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.8.5 Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.8.6 Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.9 Drive acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.10 Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . 14
1.11 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.12 Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.12.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.12.2 Electromagnetic compatibility . . . . . . . . . . . . . . . . . . . 14
1.12.3 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
iv
U4 Family Product Manual, Rev. D
2.0 Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . 17
2.1 Handling and static-discharge precautions . . . . . . . . . . . . . . 17
2.2 Jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.2.1 Master/slave configuration . . . . . . . . . . . . . . . . . . . . . . 18
2.2.2 Cable-select option . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3 Ultra ATA/66 cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.4 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.0 ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.1 ATA interface signals and connector pins . . . . . . . . . . . . . . 21
3.2 ATA Interface commands . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.2.1 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . 23
3.2.2 Identify Drive command . . . . . . . . . . . . . . . . . . . . . . . . 24
3.2.3 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.2.4 S.M.A.R.T. commands . . . . . . . . . . . . . . . . . . . . . . . . . 30
U4 Family Product Manual, Rev. D
v
Figures
Figure 1. Typical startup and operation current profile . . . . . . . . . . . . 9
Figure 2. Master/slave jumper settings . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 3. Mounting dimensions—top, side and end view . . . . . . . . . 20
Figure 4. I/O pins and supported ATA signals. . . . . . . . . . . . . . . . . . 22
Seagate Connfidential Review Draft - NOT FOR DISTRIBUTION
vi
U4 Family Product Manual, Rev. D.
Seagate Confidential Review Draft - NOT FOR DISTRIBUTION
U4 Family Product Manual, Rev. D
1
Introduction
This manual describes the functional, mechanical and interface specifi-
cations for the U4 ST38421A, ST36421A, ST34311A and the
ST32112A. These drives provide the following key features:
• Low power consumption
• Quiet operation
• 10-5 msec seek time, 5-400-RPM and 256-Kbyte buffer for excellent
desktop performance
• High instantaneous (burst) data-transfer rates (up to 66.6 Mbytes per
second) using Ultra DMA mode 4
• 300 Gs nonoperating shock
• Full-track multiple-sector transfer capability without local processor
intervention
• State-of-the-art cache and on-the-fly error-correction algorithms
• MR recording heads and EPRML technology, which provide the drives
with increased areal density
• Support for S.M.A.R.T. drive monitoring and reporting
• Support for Read Multiple and Write Multiple commands
• Support for autodetection of master/slave drives that use cable select
(CSEL)
2
U4 Family Product Manual, Rev. D
Specification summary table
The specifications listed in this table are for quick reference. For details
on specification measurement or definition, see the appropriate section
of this manual.
ST32112A
ST34311A
ST36421A
ST38421A
Drive Specification
Guaranteed Mbytes
6
(×10 bytes)
2,160
4,320
6,448
8,440
Guaranteed sectors
Bytes per sector
4,225,536 8,452,080 12,596,850 16,498,944
512
63
Default sectors per track
Default read/write heads
Default cylinders
16
15
15
16
4,192
8,944
13,330
16,368
Physical read/write
heads
1
1
2
1
3
2
4
2
Discs
Recording density
BPI (bits/inch max)
241,000
Track density
TPI (tracks/inch)
13,100
Areal density
2
(Mbits/inch max)
3,179
5,400
Spindle speed (RPM)
Internal data-transfer
rate (Mbits/sec max)
206
I/O data-transfer rate
(Mbytes/sec max)
66.6
ATA data-transfer modes
supported
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–4
Cache buffer (Kbytes)
Height (mm max)
Width (mm max)
Length (mm max)
Weight (typical)
256
26.1
102
147.0
580 grams (1.2 lb)
U4 Family Product Manual, Rev. D
3
ST32112A
ST34311A
ST36421A
ST38421A
Drive Specification
Track-to-track seek time
(msec typical)
2.0 (read), 2.75 (write)
10.5 (read), 11.5 (write)
Averageseektime(msec
typical)
Full-stroke seek time
(msec typical)
24.0 (read), 26.0 (write)
5.56 msec
Average latency (msec)
Power-on to ready
(sec typical)
8 sec
7 sec
Standby to ready
(sec typical)
Startup current (typical):
12V (peak)
1.5 amps
Seek power (typical)
Idle mode (typical)
7.0 watts
3.1 watts
0.8 watts
0.8 watts
Standby mode (typical)
Sleep mode (typical)
Voltage tolerance
(including noise)
5V ± 5%, 12V ± 10%
Ambient temperature
0° to 55°C (op.), –40° to 70°C (nonop.)
Temperature gradient
(°C per hour max)
20°C
Relative humidity
(op. and nonop.)
5% to 90% (op.)
5% to 95% (nonop.)
Relative humidity
gradient
30% per hour max
Wet bulb temperature
(°C max)
29.4 (op.), 40.0 (nonop.)
Altitude, operating
–61 m to 3,048 m (–200 ft to 10,000+ ft)
–122 m to 12,192 m (–400 ft to 40,000+ ft)
Altitude, nonoperating
Shock (Gs at 2 msec)
operating
nonoperating
63 Gs
300 Gs
Vibration, operating
0.5 Gs (0 to peak, 5–350 Hz)
4
U4 Family Product Manual, Rev. D
ST32112A
ST34311A
ST36421A
ST38421A
Drive Specification
Vibration, nonoperating
5 Gs (0 to peak, 5–350 Hz)
Drive acoustics
Sound power
3.3 (typical), 3.7(max)
3.9 (typical), 4.3 (max)
Idle mode
Seek mode
Nonrecoverable read
errors
13
1 per 10 bits read
Mean time between
failures (power-on hours)
400,000
50,000
5
Contact start-stop cycles
(25°C, 40% relative
humidity)
Service life (years)
U4 Family Product Manual, Rev. D
5
1.0 Drive specifications
Unless otherwise noted, all specifications are measured under ambient
conditions, at 25°C, and nominal power. For convenience, the phrases
the drive and this drive are used throughout this manual to indicate the
U4 ST38421A, ST36421A, ST34311A and the ST32112A.
1.1 Formatted capacity
Guaranteed Mbytes
(1 Mbyte = 106 bytes)
Guaranteed
sectors
Bytes per
sector
Drive Model
ST38421A
ST36421A
ST34311A
ST32112A
8,440
6,448
4,320
2,160
16,498,944
12,596,850
8,452,080
4,225,536
512
512
512
512
1.1.1 Default logical geometry
CHS Mode
ST38421A
ST36421A
ST34311A
ST32112A
Cylinders
16,368
13,330
8,944
Read/Write heads
Sectors per track
16
15
15
16
63
63
63
63
4,192
LBA Mode
When addressing either drive in LBA mode, all blocks (sectors) are
consecutively numbered from 0 to n–1, where n is the number of
guaranteed sectors as defined above.
1.2 Physical organization
Drive Model
ST38421A
ST36421A
ST34311A
ST32112A
Read/Write heads (MR)
Number of discs
4
3
2
1
2
2
1
1
6
U4 Family Product Manual, Rev. D
1.3 Recording and interface technology
Interface
ATA
Recording method
16/17 EPRML
241,000
13,100
3,179
Recording density BPI (bits/inch)
Track density TPI (tracks/inch)
Areal density (Mbits/inch2 max)
Spindle speed (RPM) (± 0.2%)
5,400
Internal data-transfer rate
(Mbits/sec max)
206
I/O data-transfer rate
(Mbytes /sec max)
16.6 (PIO mode 4)
66.6 (Ultra DMA mode 4)
Interleave
1:1
Cache buffer (Kbytes)
256
1.4 Physical characteristics
Drive Specification
ST38421A, ST36421A,
ST34311A, ST32112A
Maximum height (mm)
(inches)
26.1
1.028
Maximum width (mm)
(inches)
101.8
4.020
Maximum length (mm)
(inches)
147.0
5.78
Typical weight
(grams)
(pounds)
580
1.2
1.5 Seek time
Seek measurements are taken with nominal power at 25°C ambient
temperature. All times are measured using drive diagnostics. The spec-
ifications in the table below are defined as follows:
• Track-to-track seek time is an average of all possible single-track
seeks in both directions.
U4 Family Product Manual, Rev. D
7
• Average seek time is a true statistical random average of at least 5,000
measurements of seeks between random tracks, less overhead.
• Full-stroke seek time is one-half the time needed to seek from the first
data cylinder to the maximum data cylinder and back to the first data
cylinder. The full-stroke typical value is determined by averaging 100
full-stroke seeks in both directions.
Typical seek times (msec)
Track-to-track
Read
2.0
Write
2.75
11.5
26.0
—
Average
10.5
24.0
—
Full-stroke
Average latency: 5.56 msec
Note. These drives are designed to consistently meet the seek times rep-
resented in this manual. Physical seeks, regardless of mode (such as
track-to-track and average) are expected to meet or exceed the noted
values. However, due to the manner in which these drives are format-
ted, benchmark tests that include command overhead or measure
logical seeks may produce results that vary from these specifications.
1.6 Start/stop times
Power-on to Ready (sec)
Standby to Ready (sec)
Ready to spindle stop (sec)
8 (typical)
7 (typical)
10 (typical)
1.7 Power specifications
The drive receives DC power (+5V or +12V) through a four-pin standard
drive power connector.
1.7.1 Power consumption
Power requirements for the drives are listed in the table on page 9.
Typical power measurements are based on an average of drives tested,
under nominal conditions, using 5.0V input voltage at 25°C ambient
temperature.
• Spinup power
Spinup power is measured from the time of power-on to the time that
the drive spindle reaches operating speed.
8
U4 Family Product Manual, Rev. D
• Seek Mode
During seek mode, the read/write actuator arm moves toward a
specific position on the disc surface and does not execute a read or
write operation. Servo electronics are active. Seek mode power rep-
resents the worst-case power consumption, using only random seeks
with read or write latency time. This mode is not typical and is provided
for worst-case information.
• Read/Write power and current
Read/write power is measured with the heads on track, based on a
16-sector write followed by a 32-msec delay, then a 16-sector read
followed by a 32-msec delay.
• Operating power and current
Operating power is measured using 40 percent random seeks, 40
percent read/write mode (1 write for each 10 reads) and 20 percent
drive inactive.
• Idle mode power
Idle mode power is measured with the drive up to speed, with servo
electronics active and with the heads in a random track location.
• Standby mode
During Standby mode, the drive accepts commands, but the drive is
not spinning, and the servo and read/write electronics are in power-
down mode.
U4 Family Product Manual, Rev. D
9
Typical Amps RMS
Power Mode
Typical Watts
5V
12V
RMS
Spinup
—
—
1.5 (peak)
Seek (Random, no
read/write)
7.0
5.7
3.1
0.8
0.39
0.34
0.24
0.14
0.42
0.33
0.16
0.01
Operating
Idle
Standby/Sleep
1.7.1.1 Typical current profile
Figure 1 shows a typical current profile.
Current (amps)
1.2
1.0
0.8
0.6
0.4
0.2
0
1
2
3
4
5
6
7
8
Time (seconds)
Figure 1. Typical startup and operation current profile
10
U4 Family Product Manual, Rev. D
1.7.2 Conducted noise
Input noise ripple is measured at the host system power supply across
an equivalent 80-ohm resistive load on the +12 volt line or an equivalent
15-ohm resistive load on the +5 volt line.
• Using 12-volt power, the drive is expected to operate with a maximum
of 120 mV peak-to-peak square-wave injected noise at up to 10 MHz.
• Using 5-volt power the drive is expected to operate with a maximum
of 100 mV peak-to-peak square-wave injected noise at up to 10 MHz.
Note. Equivalent resistance is calculated by dividing the nominal volt-
age by the typical RMS read/write current.
1.7.3 Voltage tolerance
Voltage tolerance (including noise): 5V ± 5% and 12V ± 10%
1.7.4 Power-management modes
The drive provides programmable power management to provide great-
er energy efficiency. In most systems, you can control power manage-
ment through the system setup program. The drive features the following
power-management modes:
Power Mode
Active
Heads
Spindle
Rotating
Rotating
Stopped
Stopped
Buffer
Tracking
Tracking
Parked
Parked
Enabled
Enabled
Enabled
Disabled
Idle
Standby
Sleep
• Active mode
The drive is in Active mode during the read/write and seek operations.
• Idle mode
The buffer remains enabled, and the drive accepts all commands and
returns to Active mode any time disc access is necessary.
• Standby mode
The drive enters Standby mode when the host sends a Standby
Immediate command. If the host has set the standby timer, the drive
can also enter Standby mode automatically after the drive has been
inactive for a specifiable length of time. The standby timer delay is
established using a Standby or Idle command. In Standby mode, the
U4 Family Product Manual, Rev. D
11
drive buffer is enabled, the heads are parked and the spindle is at rest.
The drive accepts all commands and returns to Active mode any time
disc access is necessary.
• Sleep mode
The drive enters Sleep mode after receiving a Sleep command from
the host. In Sleep mode, the drive buffer is disabled, the heads are
parked and the spindle is at rest. The drive leaves Sleep mode after
it receives a Hard Reset or Soft Reset from the host. After receiving a
reset, the drive exits Sleep mode and enters Active mode with all
current translation parameters intact.
• Idle and Standby timers
Each time the drive performs an Active function (read, write or seek),
the standby timer is reinitialized and begins counting down from its
specified delay times to zero. If the standby timer reaches zero before
any drive activity is required, the drive makes a transition to Standby
mode. In both Idle and Standby mode, the drive accepts all commands
and returns to Active mode when disc access is necessary.
1.8 Environmental tolerances
1.8.1 Ambient temperature
Operating
0° to 55°C (32° to 131°F)
Nonoperating
–40° to 70°C (–40° to 158°F)
Note. Above 1,000 feet (305 meters), the maximum temperature is
derated linearly to 112°F (44°C) at 10,000 feet (3,048 meters).
Operating ambient temperature is defined as the temperature of
the environment immediately surrounding the drive.
1.8.2 Temperature gradient
Operating/Nonoperating 20°C/hr (36°F/hour) max, without condensation
1.8.3 Humidity
1.8.3.1 Relative Humidity
Operating
5% to 90% noncondensing (30% per hour max)
Nonoperating
5% to 95% noncondensing (30% per hour max)
12
U4 Family Product Manual, Rev. D
1.8.3.2 Wet bulb temperature
Operating
29.4°C (84°F) max
Nonoperating
40.0°C (104°F) max
1.8.4 Altitude
Operating
–61 m to 3,048 m (–200 ft to 10,000+ ft)
–122 m to 12,192 m (–400 ft to 40,000+ ft)
Nonoperating
1.8.5 Shock
All shock specifications assume that the drive is mounted securely with
the input shock applied at the drive mounting screws. Shock may be
applied in the X, Y or Z axis.
1.8.5.1 Operating shock
These drives comply with the performance levels specified in this docu-
ment when subjected to a maximum operating shock of 63 Gs (based
on half-sine shock pulses of 2 msec. Shocks should not be repeated
more than two times per second.
1.8.5.2 Nonoperating shock
The nonoperating shock level that the drive can experience without
incurring physical damage or degradation in performance when subse-
quently put into operation is 75 Gs (based on a nonrepetitive half-sine
shock pulse of 11 msec duration) or 300 Gs (based on a nonrepetitive
half-sine shock pulse of 2 msec duration).
1.8.6 Vibration
All vibration specifications assume that the drive is mounted securely
with the input vibration applied at the drive mounting screws. Vibration
may be applied in the X, Y or Z axis.
U4 Family Product Manual, Rev. D
13
1.8.6.1 Operating vibration
The following table lists the maximum vibration levels that the drive may expe-
rience while meeting the performance standards specified in this document.
5–21 Hz
0.02-inch displacement (peak to peak)
0.5 Gs acceleration (zero to peak)
0.3 Gs acceleration (zero to peak)
22–350 Hz
351–500 Hz
1.8.6.2 Nonoperating vibration
The following table lists the maximum nonoperating vibration that the
drive may experience without incurring physical damage or degradation
in performance when subsequently put into operation.
5–21Hz
0.02-inch displacement (peak to peak)
5.0 Gs acceleration (zero to peak)
2.0 Gs acceleration (zero to peak)
22–350 Hz
351–500 Hz
1.9 Drive acoustics
Drive acoustics are measured as overall A-weighted acoustic sound
power levels (no pure tones). All measurements are generally consistent
with ISO document 7779. Sound power measurements were taken
under essentially free-field conditions over a reflecting plane. For all
tests, the drive was oriented with the cover facing upward.
Note. For seek mode tests, the drive was placed in seek mode only.
The number of seeks per second is defined by the following
equation: (Number of seeks per second = 0.4 / (average latency + average
access time)
Acoustic mode
Idle mode
Seek mode
Sound power (bels)
3.3 (typ) 3.7 (max)
3.9 (typ) 4.3 (max)
14
U4 Family Product Manual, Rev. D
1.10 Electromagnetic susceptibility
The drive operates without errors when subjected to the following:
Radiated noise
≤ 3 volt/meter, 30 Hz to 500 MHz
≤ 10 KVolts
Electrostatic discharge*
Magnetic field strength
≤ 5 Gauss
* Electrostatic discharge susceptibility is measured with the drive
mounted in a representative computer system (mounted to a
ground plane with an earth ground). Discharges are applied to the
bezel or other external surfaces on the ground plane.
1.11 Reliability
Nonrecoverable read errors
1 per 10-13 bits read, max
Mean time between failures
400,000 power-on hours
(nominal power, 25°C ambient tem-
perature)
Contact start-stop cycles
Preventive maintenance
50,000 cycles
(atnominalvoltageandtemperature,
with 60 cycles per hour and a 50%
duty cycle)
None required
1.12 Agency certification
1.12.1 Safety certification
The drives are recognized in accordance with UL 1950 and CSA C22.2
(950) and meet all applicable sections of IEC950 and EN 60950 as tested
by TUV North America.
1.12.2 Electromagnetic compatibility
Hard drives that display the CE marking comply with European Union
requirements specified in Electromagnetic Compatibility Directives.
Testing is performed to standards EN50082-1 and EN55022-B.
Seagate uses an independent laboratory to confirm compliance with the
EC directives specified in the previous paragraph. Drives are tested in
representative end-user systems. Although CE-marked Seagate drives
U4 Family Product Manual, Rev. D
15
comply with the directives when used in the test systems, we cannot
guarantee that all systems will comply with the directives. The drive is
designed for operation inside a properly designed enclosure, with prop-
erly shielded I/O cable (if necessary) and terminators on all unused I/O
ports. Computer manufacturers and system integrators should confirm
EMC compliance and provide CE marking for their products.
Australian C-Tick
If these models have the C-Tick marking, they comply with the Australia/
New Zealand Standard AS/NZS3548 1995 and meet the Electromag-
netic Compatibility (EMC) Framework requirements of Australia’s Spec-
trum Management Agency (SMA).
1.12.3 FCC verification
These drives are intended to be contained solely within a personal
computer or similar enclosure (not attached as an external device). As
such, each drive is considered to be a subassembly even when it is
individually marketed to the customer. As a subassembly, no Federal
Communications Commission verification or certification of the device is
required.
Seagate Technology, Inc. has tested this device in enclosures as de-
scribed above to ensure that the total assembly (enclosure, disc drive,
motherboard, power supply, etc.) does comply with the limits for a Class
B computing device, pursuant to Subpart J, Part 15 of the FCC rules.
Operation with noncertified assemblies is likely to result in interference
to radio and television reception.
Radio and television interference. This equipment generates and
uses radio frequency energy and if not installed and used in strict
accordance with the manufacturer’s instructions, may cause interfer-
ence to radio and television reception.
This equipment is designed to provide reasonable protection against
such interference in a residential installation. However, there is no
guarantee that interference will not occur in a particular installation. If
this equipment does cause interference to radio or television, which can
be determined by turning the equipment on and off, you are encouraged
to try one or more of the following corrective measures:
• Reorient the receiving antenna.
• Move the device to one side or the other of the radio or TV.
• Move the device farther away from the radio or TV.
• Plug the computer into a different outlet so that the receiver and
computer are on different branch outlets.
16
U4 Family Product Manual, Rev. D
If necessary, you should consult your dealer or an experienced radio/
television technician for additional suggestions. You may find helpful the
following booklet prepared by the Federal Communications Commis-
sion: How to Identify and Resolve Radio-Television Interference Prob-
lems. This booklet is available from the Superintendent of Documents,
U.S. Government Printing Office, Washington, DC 20402. Refer to pub-
lication number 004-000-00345-4.
U4 Family Product Manual, Rev. D
17
2.0 Configuring and mounting the drive
This section contains the specifications and instructions for configuring
and mounting the drive.
2.1 Handling and static-discharge precautions
After unpacking, and before installation, the drive may be exposed to
potential handling and electrostatic discharge (ESD) hazards. Observe the
following standard handling and static-discharge precautions:
Caution:
• Keep the drive in its static-shielded bag until you are ready to complete
the installation. Do not attach any cables to the drive while it is in its
static-shielded bag.
• Before handling the drive, put on a grounded wrist strap, or ground
yourself frequently by touching the metal chassis of a computer that
is plugged into a grounded outlet. Wear a grounded wrist strap
throughout the entire installation procedure.
• Handle the drive by its edges or frame only.
• The drive is extremely fragile—handle it with care. Do not press down
on the drive top cover.
• Always rest the drive on a padded, antistatic surface until you mount
it in the computer.
• Do not touch the connector pins or the printed circuit board.
• Do not remove the factory-installed labels from the drive or cover them
with additional labels. Removal voids the warranty. Some factory-
installed labels contain information needed to service the drive. Other
labels are used to seal out dirt and contamination.
18
U4 Family Product Manual, Rev. D
2.2 Jumper settings
2.2.1 Master/slave configuration
The options jumper block (J8) shown in Figure 2 is used to configure the
drive for operation. It is the 6-pin dual header between the I/O connector
and the power connector. Use the following settings to configure the
drive as a master or a slave.
Master or single drive. The drive is configured at the factory for a master
or single-drive operation with a jumper set on pins 7 and 8.
Drive is slave. Remove the jumper to configure the drive as a slave.
Drive is master with a non-ATA-compatible slave. Set a jumper on
pins 5 and 6 and a jumper on pins 7 and 8. Use this jumper setting only
if the drive does not work as a master with a jumper set on pins 7 and 8.
Options jumper block (J8)
Master or single drive
Drive is slave
Master with a non-ATA-
compatible slave
Cable select
7 5 3 1
8 6 4
2
Figure 2. Master/slave jumper settings
U4 Family Product Manual, Rev. D
19
2.2.2 Cable-select option
Computers that use cable-select determine the master and slave drives
by selecting or deselecting pin 28, CSEL, on the interface bus. Master
and slave drives are determined by their physical position on the cable.
To enable cable select, set a jumper on pins 5 and 6 as shown in Figure
2 on page 18. Consult your computer manual to determine whether your
computer supports this option.
2.3 Ultra ATA/66 cable
An 80-conductor 40-pin cable is required to run Ultra DMA mode 3 and
4. This cable uses even-numbered conductors connected to the ground
pins to improve signal integrity.
Note. The drive supports both host and drive cable detection. The host
detects the 80-conductor cable by sampling pin 34, CBLID–, on
the interface bus. The drive detects the 80-conductor cable by
sensing a capacitor at the host side through the CBLID– signal.
The result is reported in a Fast Rise Detected bit (bit 13 of word
93 in the Identify drive parameter block).
2.4 Drive mounting
You can mount the drive in any orientation using four screws in the side-
mounting holes or four screws in the bottom-mounting holes. See Figure
4 for drive mounting dimensions.
Important mounting precautions:
• Allow a minimum clearance of 0.030 inches (0.76 mm) around the
entire perimeter of the drive for cooling.
• Use only 6-32 UNC mounting screws.
• The screws should be inserted no more than 0.200 inch (5.58 mm) into
the bottom mounting holes and no more than 0.14 inch (5.0 mm) into
the side mounting holes.
• Do not overtighten the mounting screws (maximum torque: 6 inch-lb).
• Do not use a drive interface cable that is more than 18 inches long.
20
U4 Family Product Manual, Rev. D
Note: Dimensions are shown in inches (mm).
0.180 ± 0.015
(4.57 ± 0.38)
1.00 ± 0.028
(25.4 ± 0.7)
0.230 ± 0.015
(5.84 ± 0.38
)
2.23 ± 0.03
(56.6 ± 0.8
)
3X 6-32 UNC-2B
max. insertion depth
0.14 (3.6) both sides
3.72 ± 0.03
(94.5 ± 0.8
)
4X 6-32 UNC-2B
max. insertion
depth 0.22 (5.6)
4.000
101.60
±
0.010
0.25
(
±
)
1.750
(44.45
±
0.010
25)
±
0.
5.75
146.1
±
0.03
0.8
(
±
)
2.362
±
0.010
0.25
(59.99
±
)
2.375 +0.030, –0.005
(60.33 +0.76, –0.13)
0.630 +0.030, –0.005
(16.00 +0.76, –0.13)
3.750
(95.25
±
0.010
25)
±
0.
4.00
(101.6
±
0.02
5)
0.125 +0.030, –0.005
(3.18 +0.76, –0.13)
3X.250 ± .015
(6.35 0.38)
(both sides)
±
0
.
±
Figure 3. Mounting dimensions—top, side and end view
U4 Family Product Manual, Rev. D
21
3.0 ATA interface
These drives use the industry-standard ATA task file interface that
supports 16-bit data transfers. It supports ATA programmed input/output
(PIO) modes 0–4; multiword DMA modes 0–2, and Ultra DMA modes
0–4. The drive also supports the use of the IORDY signal to provide
reliable high-speed data transfers.
You can use a daisy-chain cable to connect two drives to a single AT
host bus. For detailed information about the ATA interface, refer to the
draft of AT Attachment with Packet Interface Extension (ATA/ATAPI-4),
NCITS T13 1153D, subsequently referred to as the Draft ATA-4 Stan-
dard.
3.1 ATA interface signals and connector pins
Figure 4 on page 22 summarizes the signals on the ATA interface
connector that the drive supports. For a detailed description of these
signals, refer to the Draft ATA-4 Standard.
22
U4 Family Product Manual, Rev. D
Drive pin #
Host pin # and signal description
Signal name
–
1
2
Reset
1
2
3
4
5
6
7
8
9
Hardware Reset
Ground
DD7
Ground
3
Host Data Bus Bit 7
Host Data Bus Bit 8
Host Data Bus Bit 6
Host Data Bus Bit 9
Host Data Bus Bit 5
Host Data Bus Bit 10
Host Data Bus Bit 4
4
DD8
5
DD6
6
DD9
7
DD5
8
DD10
DD4
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
DD11
DD3
10 Host Data Bus Bit 11
11 Host Data Bus Bit 3
12 Host Data Bus Bit 12
13 Host Data Bus Bit 2
14 Host Data Bus Bit 13
15 Host Data Bus Bit 1
16 Host Data Bus Bit 14
17 Host Data Bus Bit 0
18 Device Data (15:0)
19 Ground
DD12
DD2
DD13
DD1
DD14
DD0
DD15
Ground
(removed)
DMARQ
Ground
DIOW–
STOP
Ground
(No Pin)
20
21 DMA Request
22 Ground
23 Device I/O Write:
Stop Ultra DMA Burst
24 Ground
24
25
DIOR
–
25 Device I/O Read:
Host Ultra DMA Ready:
Host Ultra DMA Data Strobe
26 Ground
27 I/O Channel Ready
Device Ultra DMA Ready
Device Ulta DMA Data Strobe
28 Cable Select
29 DMA Acknowledge
30 Ground
31 Device Interrupt
32 Reserved
33 Host Address Bus Bit 1
34 Passed Diagnostics
Cable Assembly Type Identifier
35 Device Address (2:0)
36 Device Address (2:0)
37 Chip Select (1:0)
38 Chip Select (1:0)
39 Drive Active/Slave Present
40 Ground
HDMARDY
–
HSTROBE
Ground
26
27
IORDY
DDMARDY–
DSTROBE
CSEL
28
29
30
31
32
33
34
–
DMACK
Ground
INTRQ
–
IOCS16
DA1
PDIAG
–
CBLID–
35
36
37
38
39
40
DA0
DA2
CS0
CS1
–
–
–
DASP
Ground
Pins 28, 34 and 39 are used for master-slave communication (details shown below).
Drive 1 (slave)
Drive 0 (master)
Host
28
34
39
28
34
39
CSEL
28
34
39
–
PDIAG
DASP–
Figure 4. I/O pins and supported ATA signals
U4 Family Product Manual, Rev. D
23
3.2 ATA Interface commands
3.2.1 Supported ATA commands
The following table lists ATA-standard commands that the drive sup-
ports. For a detailed description of the ATA commands, refer to the Draft
ATA-4 Standard. See Section 3.2.4 on page 30 for details and subcom-
mands used in the S.M.A.R.T. implementation.
Command name
ATA-standard commands
Download Microcode
Command code (in hex)
92H
90H
Execute Device Diagnostics
Flush Cache
E7H
Format Track
Identify Device
Initialize Device Parameters
Read Buffer
50H
ECH
91H
E4H
Read DMA
C8H, C9H
C4H
Read Multiple
Read Sectors
Read Verify Sectors
Recalibrate
20H, 21H
40H, 41H
10H
Seek
70H
Set Features
EFH
Set Multiple Mode
S.M.A.R.T.
C6H
B0H
Write Buffer
E8H
Write DMA
CAH, CBH
C5H
Write Multiple
24
U4 Family Product Manual, Rev. D
Command name
Write Sectors
Command code (in hex)
30H, 31H
ATA-standard power-management commands
Check Power Mode
Idle
98H or E5H
97H or E3H
95H or E1H
99H or E6H
96H or E2H
94H or E0H
Idle Immediate
Sleep
Standby
Standby Immediate
ATA-standard security commands
Security Set Password
Security Unlock
F1H
F2H
F3H
F4H
F5H
F6H
Security Erase Prepare
Security Erase Unit
Security Freeze Lock
Security Disable Password
3.2.2 Identify Drive command
The Identify Drive command (command code ECH) transfers information
about the drive to the host following power up. The data is organized as
a single 512-byte block of data, whose contents are shown in the table
below. All reserved bits or words should be set to zero. Parameters listed
with an “x” are drive-specific or vary with the state of the drive. See
Section 1 of this manual for default parameter settings.
The following commands contain drive-specific features that may not be
included in the Draft ATA-4 Standard.
U4 Family Product Manual, Rev. D
25
Word
Description
Value
Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
• Bit 7: removable media
• Bit 6: removable controller
• Bit 0: reserved
0C5A
H
0
1060
H
(ST32112A)
22F0
(ST34311A)
1
Number of logical cylinders:
H
ST32112A = 4,192
ST34311A = 8,944
ST36421A = 13,330
ST38421A = 16,368
3412
H
(ST36421A)
3FF0
H
(ST38421A)
0000
2
3
ATA-reserved
H
10
Number of logical heads:
H
(ST32112A)
(ST38421A)
ST32112A = 16
ST34311A = 15
ST36421A = 15
ST38421A = 16
0F
H
(ST34311A)
(ST36421A)
0000
4
5
6
Retired
Retired
H
0000
H
Number of logical sectors per logical
track: 63
003F
H
0000
7–9
Retired
H
10–19
Serial number: (20 ASCII characters,
0000H = none)
ASCII
0000
20
21
Retired
Retired
Obsolete
H
0200
H
0004
22
H
23–26
Firmware revision (8 ASCII character
string, padded with blanks to end of
string)
x.xx
26
U4 Family Product Manual, Rev. D
Word
Description
Value
ST32112A
ST34311A
ST36421A
ST38421A
27–46
Drive model number: (40 ASCII char-
acters, padded with blanks to end of
string)
47
(Bits 7–0) Maximum sectors per inter-
rupt on Read multiple and Write mul-
tiple (16)
8010
H
0000
48
49
Reserved
H
2F00
Standard Standby timer, IORDY
supported and may be disabled
H
0000
50
51
52
53
54
55
56
ATA-reserved
H
0200
PIO data-transfer cycle timing mode
Retired
H
0200
H
0007
Words 54–58, 64–70 and 88 are valid
Number of current logical cylinders
Number of current logical heads
H
xxxx
H
xxxx
H
Number of current logical sectors per
logical track
xxxx
H
xxxx
57–58
59
Current capacity in sectors
H
Number of sectors transferred during
a Read Multiple or Write Multiple
command
xxxx
H
7A00 0040
60–61
Total number of user-addressable
LBA sectors available:
H
H
(ST32112A)
F7F0 0080
H
H
ST32112A = 4,225,536
ST34311A = 8,452,080
ST36421A = 12,596,850
ST38421A = 16,498,944
(ST34311A)
3672 00C0
H
H
(ST36421A)
C100 00FB
H
H
(ST38421A)
0000
62
Retired
H
U4 Family Product Manual, Rev. D
27
Word
Description
Value
xx07
63
Multiword DMA active and modes
supported (see note following this
table)
H
0003
64
65
66
Advanced PIO modes supported
(modes 3 and 4 supported)
H
0078
Minimum multiword DMA transfer
cycle time per word (120 nsec)
H
0078
Recommended multiword DMA
transfer cycle time per word (120
nsec)
H
00F0
67
68
Minimum PIO cycle time without
IORDY flow control (240 nsec)
H
Minimum PIO cycle time with IORDY
flow control (120 nsec)
0078
H
0000
69–74
75
ATA-reserved
H
0000
Queue depth
H
0000
76–79
80
ATA-reserved
H
001E
Major version number
Minor version number
Command sets supported
Command sets supported
Command sets support extension
Command sets enabled
Command sets enabled
Command sets enable extension
H
0000
81
H
346B
82
H
4001
83
H
4000
84
H
xxxx
85
H
xxxx
86
H
xxxx
87
H
001F
88
Ultra DMA support and current mode
(see note following this table)
H
0000
89
90
Security erase time
H
0000
Enhanced security erase time
H
28
U4 Family Product Manual, Rev. D
Word
91–92
93
Description
Value
0000
ATA-reserved
H
4000
Hardware Reset Value
H
(see description following this table)
0000
94–127 ATA-reserved
128 Security Status
H
0001
H
xxxx
129–159 Seagate-reserved
160–255 ATA-reserved
H
0000
H
Note. See the bit descriptions below for words, 63, 88, and 93 of the
Identify Drive data:
Description (if bit is set to 1)
Bit Word 63
0
Multiword DMA mode 0 is supported.
Multiword DMA mode 1 is supported.
Multiword DMA mode 2 is supported.
Multiword DMA mode 0 is currently active.
Multiword DMA mode 1 is currently active.
Multiword DMA mode 2 is currently active.
1
2
8
9
10
Bit Word 88
0
Ultra DMA mode 0 is supported.
1
Ultra DMA mode 1 is supported.
Ultra DMA mode 2 is supported.
Ultra DMA mode 3 is supported.
Ultra DMA mode 4 is supported.
Ultra DMA mode 0 is currently active.
Ultra DMA mode 1 is currently active.
Ultra DMA mode 2 is currently active.
2
3
4
8
9
10
U4 Family Product Manual, Rev. D
29
11
12
Ultra DMA mode 3 is currently active.
Ultra DMA mode 4 is currently active.
Bit Word 93
13 1=80-conductor cable detected, CBLID above VIH
0=40-conductor cable detected, CBLID below VIL
3.2.3 Set Features command
This command controls the implementation of various features that the
drive supports. When the drive receives this command, it sets BSY,
checks the contents of the Features register, clears BSY and generates
an interrupt. If the value in the register does not represent a feature that
the drive supports, the command is aborted. Power-on default has the
read look-ahead and write caching features enabled. The acceptable
values for the Features register are defined as follows:
02H
03H
Enable write cache (default).
Set transfer mode (based on value in Sector Count register).
Sector Count register values:
00H Set PIO mode to default (PIO mode 2).
01H Set PIO mode to default and disable IORDY(PIOmode 2).
08H PIO mode 0
09H PIO mode 1
0AH PIO mode 2
0BH PIO mode 3
0CH PIO mode 4 (default)
20H Multiword DMA mode 0
21H Multiword DMA mode 1
22H Multiword DMA mode 2
40H Ultra DMA mode 0
41H Ultra DMA mode 1
42H Ultra DMA mode 2
43H Ultra DMA mode 3
44H Ultra DMA mode 4
30
U4 Family Product Manual, Rev. D
55H
Disable read look-ahead (read cache) feature.
82H
Disable write cache.
AAH
Enable read look-ahead (read cache) feature (default).
Note. At power-on, or after a hardware or software reset, the default
values of the features are as indicated above.
3.2.4 S.M.A.R.T. commands
S.M.A.R.T. provides near-term failure prediction for disc drives. When
S.M.A.R.T. is enabled, the drive monitors predetermined drive attributes
thataresusceptibletodegradationovertime. Ifself-monitoringdetermines
that a failure is likely, S.M.A.R.T. makes a status report available to the
host. Not all failures are predictable. S.M.A.R.T. predictability is limited to
the attributes the drive can monitor. For more information on S.M.A.R.T.
commands and implementation, see the Draft ATA-4 Standard.
This drive is shipped with S.M.A.R.T. features disabled. You must have
a recent BIOS or software package that supports S.M.A.R.T. to enable
this feature. The table below shows the S.M.A.R.T. command codes that
the drive uses.
Code in Features
Register
S.M.A.R.T. Command
D0H
S.M.A.R.T. Read Data
D1H
Vendor-specific
D2H
S.M.A.R.T. Enable/Disable Attribute Autosave
S.M.A.R.T. Save Attribute Values
S.M.A.R.T. Execute Off-line Immediate
Vendor-specific
D3H
D4H
D7H
D8H
S.M.A.R.T. Enable Operations
S.M.A.R.T. Disable Operations
S.M.A.R.T. Return Status
D9H
DAH
Note. If an appropriate code is not written to the Features Register, the
command is aborted and 0x04 (abort) is written to the Error
register.
32
U4 Family Product Manual, Rev. D
U4 Family Product Manual, Rev. D
33
Seagate Technology, Inc.
920 Disc Drive, Scotts Valley, California 95066, USA
Publication Number: SG35116-001, Rev. D, Printed in USA
|