LSI Network Card SYM22801 User Manual

Symbios SYM22801  
Dual Channel PCI to Ultra  
SCSI Host Adapter  
User’s Guide  
Version 2.0  
®
S14017  
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iv  
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Contents  
Chapter 1  
Using the SYM22801 Host Adapter  
1.1  
1.2  
General Description  
Features  
1-1  
1-2  
1-2  
1-2  
1-2  
1-3  
1-3  
1-3  
1-4  
1.2.1  
1.2.2  
1.2.3  
PCI Interface  
SCSI Interface  
Board Characteristics  
1.3  
Interface Descriptions  
1.3.1  
1.3.2  
1.3.3  
The PCI Interface  
The SCSI Interface  
Ultra SCSI  
Chapter 2  
Installing the SYM22801 Host Adapter  
2.1  
2.2  
Quick Installation Procedure  
Detailed Installation Procedure  
2-1  
2-3  
2.2.1  
2.2.2  
2.2.3  
2.2.4  
2.2.5  
Before You Start  
2-3  
Inserting the Host Adapter  
2-4  
Connecting the SCSI Peripherals  
Making Internal SCSI Bus Connections  
Making External SCSI Bus Connections  
2-6  
2-8  
2-15  
2-18  
2-19  
2-20  
2-21  
2.3  
SCSI Bus Termination  
2.3.1  
2.3.2  
2.3.3  
2.3.4  
Internal SCSI Connections  
External SCSI Connections  
Internal and External SCSI Connections  
Internal SCSI Connections for Both Internal  
Connectors  
2-22  
2-25  
2-27  
2-28  
2.3.5  
Setting SCSI IDs  
2.4  
2.5  
Setting Interrupts  
Completing Your Installation  
Contents  
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Chapter 3  
Configuring the Host Adapter  
3.1  
3.2  
When to Configure the SYM22801 Host Adapter  
Starting the SCSI BIOS Configuration Utility  
3-1  
3-2  
3.2.1  
3.2.2  
3.2.3  
Configuration Utility Main Menu  
Utilities Menu  
3-3  
3-6  
Device Selections Menu  
3-10  
3-13  
3.3  
Exiting the SCSI BIOS Configuration Utility  
Appendix A  
Technical Specifications  
A.1  
Physical Environment  
A-1  
A-1  
A-2  
A-3  
A-3  
A-3  
A-3  
A-3  
A-6  
A-9  
A.1.1  
Physical Characteristics  
A.2  
Electrical Characteristics  
A.2.1  
A.2.2  
A.2.3  
Thermal, Atmospheric Characteristics  
Electromagnetic Compliance  
Safety Characteristics  
A.3  
Operational Environment  
A.3.1  
A.3.2  
A.3.3  
The PCI Interface  
The SCSI Interface  
The LED Interface  
Appendix B  
Glossary of Terms and Abbreviations  
Index  
Customer Feedback  
Figures  
2.1  
2.2  
2.3  
2.4  
Hardware Connections for the SYM22801 Host Adapter  
Inserting the Host Adapter  
2-5  
2-6  
2-7  
SCSI Cables  
Internal Wide SCSI Ribbon Cable to Host Adapter  
Connection  
2-9  
2.5  
2.6  
Internal SCSI Ribbon Cable to Host Adapter Connection  
Internal SCSI Ribbon Cable to Internal SCSI Device  
Connection  
2-10  
2-11  
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2.7  
2.8  
2.9  
Connecting Additional Internal SCSI Devices  
Multiple Internal SCSI Devices Chained Together  
Using Both Internal Connectors on a Channel  
2-12  
2-13  
2-14  
2-15  
2-16  
2-17  
2-18  
2-20  
2-21  
2-22  
2-23  
2-25  
A-2  
2.10 SCSI LED Connectors  
2.11 External Cable to Host Adapter  
2.12 External Cable to External SCSI Device  
2.13 Multiple External SCSI Devices Chained Together  
2.14 Internal SCSI Device Termination  
2.15 External SCSI Device Termination  
2.16 Internal and External SCSI Device Termination  
2.17 Internal and Internal SCSI Device Termination  
2.18 Termination Override Switch Settings for U1 and U2  
A.1  
SYM22801 Mechanical Drawing  
Tables  
2.1  
2.2  
3.1  
3.2  
A.1  
A.2  
A.3  
A.4  
A.5  
SCSI ID Record  
2-26  
2-27  
3-1  
Setting Interrupts  
Global Default Settings  
Device Default Settings  
PCI Connector J1 (Front)  
PCI Connector J1 (Back)  
SCSI Connectors J2/J6 and J3/J7  
SCSI Connectors J4/J8  
LED Connectors J5/J9  
3-2  
A-4  
A-5  
A-7  
A-8  
A-9  
Contents  
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viii  
Contents  
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Preface  
This book is the primary reference and User’s Guide for the LSI Logic  
Symbios SYM22801 Dual Channel PCI to Ultra SCSI Host Adapter. It  
contains a complete functional description for the SYM22801 and  
includes complete physical and electrical specifications for the  
SYM22801.  
Audience  
This document assumes that you have some familiarity with  
microprocessors and related support devices. The people who benefit  
from this book are:  
Engineers and managers who are evaluating the processor for  
possible use in a system  
Engineers who are designing the processor into a system  
Organization  
This document has the following chapters and appendixes:  
Chapter 1, Using the SYM22801 Host Adapter, defines the  
interfaces and characteristics of the SYM22801 Dual Channel PCI to  
Ultra SCSI Host Adapter Board.  
Chapter 2, Installing the SYM22801 Host Adapter, provides both  
quick and detailed installation instructions.  
Chapter 3, Configuring the Host Adapter, describes the SCSI  
BIOS Configuration Utility to configure adapter and device settings.  
Appendix A, Technical Specifications, describes the physical and  
operational environments of the SYM22801 Host Adapter Board.  
Preface  
ix  
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Appendix B, Glossary of Terms and Abbreviations, provides  
definitions of various terminology that is referenced throughout this  
user’s guide.  
Related Publications  
PCI SCSI Device Management System SDMS 4.0 User’s Guide,  
Document No. DB15-000099-01  
x
Preface  
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Chapter 1  
Using the SYM22801  
Host Adapter  
This chapter describes how the SYM22801 Host Adapter interfaces to  
PCI computer systems and includes these topics:  
Section 1.1, “General Description,” page 1-1  
Section 1.2, “Features,” page 1-2  
Section 1.3, “Interface Descriptions,” page 1-3  
1.1 General Description  
LSI Logic’s Symbios™ SYM22801 Dual Channel PCI to Ultra SCSI host  
adapter provides a SCSI-3, Ultra SCSI interface to PCI computer  
systems. Installing this adapter in your PCI system allows connection of  
SCSI devices over a SCSI bus.  
The dual channel SYM22801 board provides 16-bit, Single-Ended (SE),  
SCSI solutions for your computer, using only one PCI slot. This board  
supports legacy Fast SCSI devices, and the newest Ultra SCSI devices.  
It is also backwards compatible with the existing SYM8751SP host  
adapter but with a different external connector.  
Symbios SCSI Device Management System (SDMS™) software  
operates the board, but the design of the board does not prevent other  
software from being written and used with it. BIOS support for this host  
adapter is incorporated on the board in an 8 X 64K Flash BIOS.  
This guide and the PCI SCSI Device Management System SDMS 4.0  
User’s Guide contain product information and installation instructions to  
help you gain the full benefits of the SYM22801 Dual Channel PCI to  
Ultra SCSI host adapter for your computer system.  
Symbios SYM22801 Dual Channel PCI to Ultra SCSI Host Adapter  
1-1  
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1.2 Features  
This section provides a high level overview of the PCI Interface, the SCSI  
Interface, and Board Chacteristics for the SYM22801 Host Adapter  
board.  
1.2.1 PCI Interface  
Full 32-bit DMA bus master  
Zero wait-state bus master data bursts  
Universal PCI bus voltage support  
1.2.2 SCSI Interface  
Two independent SCSI channels  
16-bit single-ended  
Automatically enabled active termination  
Three connectors per channel:  
68-pin VHDCI external  
68-pin right-angle high density internal with jack blocks  
50-pin vertical low density internal  
Fast and Ultra SCSI data transfer capability  
SCSI TERMPWR source with autoresetting circuit breaker and  
TERMPWR shorted LED  
SCAM (SCSI Configured AutoMatically) off in BIOS version 4.09 and  
later  
Flash EEPROM for BIOS storage  
Serial NVRAM (Non Volatile Random Access Memory) on each  
channel for user configuration utility and SCAM information storage  
SCSI activity LED connector for each channel  
1.2.3 Board Characteristics  
PCI board dimensions,  
190 x 96.52 mm (7.50 x 3.80 inches)  
Universal 32-bit card edge connector  
1-2  
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1.3 Interface Descriptions  
This section provides a more detailed explanation about the PCI  
Interface, The SCSI Interface, and Ultra SCSI.  
1.3.1 The PCI Interface  
PCI is a high-speed standard local bus for interfacing a number of I/O  
components to the processor and memory subsystems in a high end PC.  
The PCI functionality for the SYM22801 is contained within the Symbios  
SYM53C876 PCI to Ultra SCSI I/O Processor chip. The SYM53C876  
connects directly to the PCI bus and generates timing protocol in  
compliance with the PCI specification.  
The PCI interface operates as a 32-bit DMA bus master. The connection  
is made through the edge connector J1 (see Figure 2.1). The signal  
definitions and pin numbers conform to the PCI Local Bus Specification  
Revision 2.1 standard. The SYM22801 conforms to the PCI universal  
signaling environment for a 5 V or 3.3 V PCI bus.  
1.3.2 The SCSI Interface  
The SCSI functionality for the SYM22801 is contained within the  
Symbios SYM53C876 PCI-Ultra SCSI I/O Processor chip. The  
SYM53C876 connects directly to the two SCSI buses and generates  
timing and protocol in compliance with the SCSI standard.  
The SCSI interfaces on the SYM22801 operates as 16-bit, synchronous  
or asynchronous, single-ended bus, and support Ultra SCSI protocols  
and 16-bit arbitration. Each interface is made through two (and only two)  
of the connectors J2, J3, and J4 (for Channel A), or J6, J7, and J8 (for  
Channel B). Connectors J2 and J6 are 68-pin high density right-angle  
receptacles. Connectors J3 and J7 are shielded 68-pin VHDCI 0.8 mm  
right-angle receptacles that protrude through the back panel bracket.  
Connectors J4 and J8 are 50-pin low density vertical shrouded pin  
headers. See Figure 2.1 for the location of these connectors.  
Single-ended SCSI active termination is provided on the SYM22801  
board. Termination is automatically enabled when only one of the  
connectors J2, J3, and J4 (or J6, J7, and J8) is used, or when an 8-bit  
device is connected to the 16-bit J3 or J7 connectors. In the latter case,  
Interface Descriptions  
1-3  
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only the upper 8 data bits are automatically terminated. The SYM22801  
supplies SCSI bus TERMPWR (termination power) through a blocking  
diode and a self-resetting 1.5 A short circuit protection device. The  
onboard LED lights when TERMPWR is shorted. Separate switches for  
each channel allow user override of termination.  
A 40 MHz oscillator is installed on the SYM22801 to provide the clock  
frequency to the SYM53C876 that is necessary to support Wide Ultra  
SCSI transfers of up to 40 Mbytes/s.  
1.3.3 Ultra SCSI  
The SYM22801 has full support for Ultra SCSI as well as supporting Fast  
SCSI simultaneously. Ultra SCSI is an extension of the SCSI-3 family of  
standards that expands the bandwidth of the SCSI bus, allowing faster  
synchronous data transfers. Special SCSI cables are specified for  
operation with Ultra SCSI devices, and you must consider the total  
number of devices and the length of the SCSI bus when setting up your  
system. See Chapter 2, Installing the SYM22801 Host Adapter for a  
detailed explanation of SCSI bus connections.  
1-4  
Using the SYM22801 Host Adapter  
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Chapter 2  
Installing the SYM22801 Host  
Adapter  
This chapter provides instructions on how to install the SYM22801 Host  
Adapter and includes these topics:  
Section 2.1, “Quick Installation Procedure,” page 2-1  
Section 2.2, “Detailed Installation Procedure,” page 2-3  
Section 2.3, “SCSI Bus Termination,” page 2-18  
Section 2.4, “Setting Interrupts,” page 2-27  
Section 2.5, “Completing Your Installation,” page 2-28  
2.1 Quick Installation Procedure  
This section provides quick setup instructions for the experienced  
computer user with prior host adapter installation and SCSI bus setup  
experience. If you prefer more detailed guidance in installing the  
SYM22801 host adapter, please follow the instructions in Section 2.2,  
“Detailed Installation Procedure.”  
For safe and proper installation, check the user’s manual supplied with  
your computer and perform the following steps.  
Step 1. Ground yourself before removing this host adapter board.  
Remove the SYM22801 Dual Channel to PCI Ultra SCSI Host  
Adapter board from the packing and check that it is not  
damaged. An example of this host adapter board is shown in  
Figure 2.1.  
Step 2. Switch off and unplug the system.  
Step 3. Remove the cabinet cover on your computer to access the PCI  
slots. Refer to the user’s manual for your computer.  
Symbios SYM22801 Dual Channel PCI to Ultra SCSI Host Adapter  
2-1  
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Caution:  
Ground yourself by touching a metal surface before  
handling boards. Static charges on your body can damage  
electronic components. Handle plug-in boards by the edge;  
do not touch board components or gold connector contacts.  
The use of a static ground strap is recommended.  
Step 4. Locate the slots for PCI plug-in board installation.  
Refer to the user’s manual for your computer to confirm the  
location of the PCI slots. The SYM22801 requires a PCI slot  
that allows bus master operation.  
Step 5. Remove the blank panel on the back of the computer aligned  
with the PCI slot you intend to use. Save the bracket screw.  
Step 6. Carefully insert the edge connector J1 of the host adapter into  
the PCI slot. Make sure the edge connector is properly  
engaged before pressing the board into place. See the example  
shown in Figure 2.1.  
Note:  
You may notice that the components on a PCI host adapter  
face the opposite way from those on other non-PCI adapter  
boards you have in your system. This is correct, and the  
board is keyed to go in only one way.  
Step 7. The bracket around the connectors J3 and J7 (see Figure 2.1)  
should fit where the blank panel was removed. Secure the  
bracket with the bracket screw before making the internal and  
external SCSI bus connections.  
Step 8. If you are connecting any internal SCSI devices, plug a 68-pin  
connector on the end of the internal SCSI ribbon cable into  
connector J2 or J6 for Wide SCSI, or a 50-pin connector into  
connector J4 or J8 for normal SCSI (see Figure 2.1). Make  
certain to match pin-1 on both connectors.  
Note:  
It is possible to use both internal connectors on a channel  
if no external devices are attached to that chanel. You may  
use only two of the three connectors on each channel at  
once.  
Step 9. Connect your computer’s LED cable if desired. This is designed  
to drive the front panel LED found on most PC cabinets to  
indicate activity on the SCSI bus. See Table A.5 in Appendix A  
for the signal name and pin numbers for this LED interface.  
2-2  
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Step 10. Replace the cabinet cover as described in the user’s manual  
for your computer.  
Step 11. Make all external SCSI bus connections.  
Remember: The SCSI bus requires proper termination, and no duplicate  
SCSI IDs.  
Step 12. Finally, refer to the PCI SCSI Device Management System  
SDMS 4.0 User’s Guide (or the guide for the software that you  
will use) to load the driver software for your particular operating  
system.  
2.2 Detailed Installation Procedure  
This section provides step-by-step instructions for installing the  
SYM22801 host adapter and connecting it to your SCSI peripherals. If  
you are experienced in these tasks, you may prefer to use the preceding  
Section 2.1, “Quick Installation Procedure.” If you are not confident that  
you can perform the tasks as described here, LSI Logic suggests getting  
assistance.  
2.2.1 Before You Start  
Before you start, look through the task list below to get an overall idea  
of the steps to perform.  
Open your PC cabinet and select an open PCI slot  
Insert the host adapter  
Connect your SCSI peripherals  
Internal  
External  
Terminate the SCSI bus  
Set the peripheral SCSI IDs  
Make any configuration changes  
Close your PC cabinet  
Install the software  
Detailed Installation Procedure  
2-3  
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The SCSI host adapter acts on your computer’s behalf as the host to  
your suite of SCSI peripherals. Each chain of SCSI peripheral devices  
and their host adapter work together, and are referred to as a SCSI bus.  
Each SYM22801 host adapter that you install can access up to 15  
peripheral devices per channel.  
2.2.2 Inserting the Host Adapter  
For safe and proper installation, check the user’s manual supplied with  
your computer to perform the following steps.  
Step 1. Ground yourself before removing this host adapter board.  
Remove the SYM22801 Dual Channel PCI to Ultra SCSI Host  
Adapter board from the packing and check that it is not  
damaged. An example of this host adapter board is shown in  
Figure 2.1.  
Step 2. Switch off and unplug power cords for all components in your  
system.  
Step 3. Remove the cabinet cover on your computer to access the PCI  
slots.  
Caution:  
Ground yourself by touching a metal surface before  
removing the cabinet cover. Static charges on your body  
can damage electronic components. Handle plug-in boards  
by the edge; do not touch board components or gold  
connector contacts. The use of a static ground strap is  
recommended.  
Step 4. Locate the slots for PCI plug-in board installation.  
Refer to the user’s manual for your computer to confirm the  
location of the PCI slots. The SYM22801 requires a PCI slot  
which allows bus master operation.  
Step 5. Remove the blank panel on the back of the computer aligned  
with the PCI slot you intend to use. Save the bracket screw.  
2-4  
Installing the SYM22801 Host Adapter  
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Figure 2.1 Hardware Connections for the SYM22801 Host Adapter  
Channel A  
LED Connector  
J5  
Channel B  
68-pin Internal  
High Density  
SCSI Interface  
J6  
Channel B  
LED Connecto  
J9  
Channel A  
68-pin Internal  
High Density  
SCSI Interface  
J2  
Channel B  
Termination  
Override  
Switches  
U2  
Channel B  
50-pin Internal  
Low Density  
SCSI Interface  
J8  
Channel A  
68-pin External  
VHDCI  
Channel A  
50-pin Internal  
Low Density  
SCSI Interface  
J4  
Channel A  
Termination  
Override  
Switches  
U1  
SCSI Interface  
J3  
Channel B  
68-pin External  
VHDCI  
SCSI Interface  
J7  
SYM22801 to PCI Bus  
Connector on Mainboard  
J1  
Step 6. Carefully insert the edge connector J1 (see Figure 2.1) of the  
host adapter into the PCI slot. Make sure the edge connector  
is properly engaged before pressing the board into place as  
shown in Figure 2.2.  
Step 7. To plan on hooking up another host adapter on the same bus  
as this host adapter, or an 8-bit device on 68-pin connector, see  
the Channel Switches section discussed later in this chapter.  
Notice that the components on a PCI host adapter face the opposite way  
from those on other non-PCI adapter boards you have in your system.  
This is correct, and the board is keyed to go in only one way.  
Detailed Installation Procedure  
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Figure 2.2 Inserting the Host Adapter  
Bracket Screw  
Step 8. The bracket around the connectors J3 and J7 (see Figure 2.1)  
should fit where you removed the blank panel. Secure it with  
the bracket screw (see Figure 2.2) before making the internal  
and external SCSI bus connections.  
2.2.3 Connecting the SCSI Peripherals  
SCSI bus connections to the SYM22801 host adapter inside the  
computer are made with an unshielded, 68 or 50-conductor ribbon cable  
(see Figure 2.3). One side of this cable is marked with a color to indicate  
the pin-1 side. Sometimes the connectors on this cable are keyed to  
ensure proper pin-1 connection.  
2-6  
Installing the SYM22801 Host Adapter  
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All external SCSI bus connections to the SYM22801 host adapter are  
made with shielded, 68-conductor cables (see Figure 2.3). The  
connectors on this cable are always keyed to ensure proper pin-1  
connection.  
Figure 2.3 SCSI Cables  
SC SI C ables for Internal Connections  
68-pin  
H igh Density  
and/or  
50-pin  
Low D ensity  
SCSI Cable for External Connections  
68-pin  
VHD CI  
Important:  
You can connect up to sixteen SCSI and Fast SCSI  
devices, including the host adapter board, on a single-  
ended SCSI bus only if they are at least .3m apart on a 6  
meter cable. For Ultra SCSI, you can connect up to eight  
devices, including the host adapter board, on a  
single-ended Ultra SCSI bus only if they are evenly spaced  
on a 1.5 meter Ultra SCSI cable (0.19m between devices).  
You can connect up to four devices if they are evenly  
spaced on a 3 meter Ultra SCSI cable (0.75m between  
devices). Your single-ended SCSI bus should not exceed  
Detailed Installation Procedure  
2-7  
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3 meters (total internal and external cable lengths), even  
with fewer than four devices. The SYM22801  
autotermination scheme is designed to operate properly  
when plugging the end connector of the SCSI cables into  
the SYM22801 SCSI connectors.  
If you connect the SYM22801 in the middle of the bus, you  
will incur improper termination since the switches are not  
assigned on that bus correctly. Refer to the Channel  
Switches section for more information.  
2.2.4 Making Internal SCSI Bus Connections  
This section provides step-by-step instructions about making internal  
SCSI bus connections:  
Step 1. If you are connecting an internal Wide SCSI device, plug the  
68-pin connector on one end of a wide internal SCSI ribbon  
cable into the connector J2, or J6 (see Figure 2.4). Make  
certain to match pin-1 on both connectors.  
2-8  
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Figure 2.4 Internal Wide SCSI Ribbon Cable to Host Adapter  
Connection  
J6  
J2  
Step 2. To connect an 8-bit internal SCSI device, plug the 50-pin  
connector on one end of an 8-conductor internal SCSI ribbon  
cable into the connector J4 or J8 (see Figure 2.5). Make certain  
to match pin-1 on both connectors.  
Detailed Installation Procedure  
2-9  
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Figure 2.5 Internal SCSI Ribbon Cable to Host Adapter  
Connection  
Channel B  
J8  
Channel A  
J4  
Step 3. Plug the 68 or 50-pin connector on the other end of the internal  
SCSI ribbon cable into the SCSI connector on the internal SCSI  
device. An example of this connection is shown in Figure 2.6.  
You must match pin-1 on all connections.  
2-10  
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Figure 2.6 Internal SCSI Ribbon Cable to Internal SCSI Device  
Connection  
Step 4. Additional internal SCSI devices are plugged in by using an  
internal SCSI ribbon cable with the required number of  
connectors attached along its length as shown in Figure 2.7.  
An example of this type of chained connection is shown in  
Figure 2.8. Make sure to match pin-1 on all connections.  
Detailed Installation Procedure  
2-11  
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Figure 2.7 Connecting Additional Internal SCSI Devices  
2-12  
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Figure 2.8 Multiple Internal SCSI Devices Chained Together  
Step 5. It is also possible to use both internal connectors on a channel  
if you do not attach any external devices to that channel. An  
example of this configuration is shown in Figure 2.9.  
Detailed Installation Procedure  
2-13  
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Figure 2.9 Using Both Internal Connectors on a Channel  
Note:  
When two connectors are already used on a channel, the  
third connector cannot be used.  
Step 6. Most PC cabinets are designed with a front panel LED  
(sometimes already connected to an existing IDE drive). You  
may connect this LED cable to the host adapter, as shown in  
Figure 2.10. This causes the front panel LED to indicate activity  
on the SCSI bus.  
This connector is not keyed. The orientation of the LED cable  
does not matter as long as all four pins are connected.  
2-14  
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Figure 2.10 SCSI LED Connectors  
Some LED cables have only two wires. In this case, place the connector  
on one end or the other of J5 or J9. If the LED does not light during SCSI  
bus activity from this host adapter, you may have to rotate the LED cable  
180° on J5 or J9. See Table A.5 for pin descriptions.  
2.2.5 Making External SCSI Bus Connections  
This section provides step-by-step instructions about making internal  
SCSI bus connections:  
Step 1. To connect external SCSI devices to the SYM22801 host  
adapter, plug the 68-pin connector on one end of a shielded  
external SCSI VHDCI cable (see Figure 2.3) into the host  
adapter connector J3 or J7 (see Figure 2.1).  
This connector is now bracketed to the back panel of your  
computer. Figure 2.11 shows how this connection is made.  
Detailed Installation Procedure  
2-15  
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Figure 2.11 External Cable to Host Adapter  
Step 2. Plug the 68-pin connector on the other end of the shielded  
external SCSI cable into the SCSI connector on your external  
SCSI device. An example of this connection is shown in  
Figure 2.12.  
2-16  
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Figure 2.12 External Cable to External SCSI Device  
Step 3. To connect more than one external SCSI device to the host  
adapter, you must chain them together with shielded external  
SCSI cables. An example of these chained connections is  
shown in Figure 2.13.  
Detailed Installation Procedure  
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Figure 2.13 Multiple External SCSI Devices Chained Together  
2.3 SCSI Bus Termination  
The devices making up the SCSI bus are connected serially (chained  
together) with SCSI cables. The first and last physical SCSI devices  
connected on the ends of the SCSI bus must have a set of resistors  
called terminators. All other SCSI devices on the bus must have their  
terminators removed or disabled.  
Remember: The SYM22801 host adapter is also on the SCSI bus; its  
termination is automatically enabled when it is connected to  
the end of the bus.  
2-18  
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The peripheral device terminators are usually set with jumpers, resistor  
modules, or with a switch on the peripheral. Refer to the peripheral  
manufacturer’s instructions and to the user’s manual for your computer  
for information on how to identify the terminator setting of each device  
and how to change it.  
Caution:  
The auto-enable/disable sensing feature on the SYM22801  
may enable termination erroneously if it is directly cabled to  
another SCSI device or host adapter using the same  
sensing method. This is dealt with by properly setting the  
termination override switches U1 or U2 (see Figure 2.1) as  
explained in this section under making an internal  
connection with another SYM22801.  
The SYM22801 senses SCSI devices by detecting the ground signal on  
pin-22 of a 50-conductor internal SCSI ribbon cable, or pin-50 of an  
internal or external 68-conductor SCSI cable. If you use an adapter to  
connect 8-bit devices externally with a 50-conductor SCSI cable, the  
ground signal is detected on pin-34.  
The SYM22801 automatically covers SCSI bus termination for five  
different bus configurations, depending on the use of the connectors on  
the SYM22801 host adapter (see Figure 2.1). The five bus configurations  
are:  
Only for internal SCSI connections,  
Only for external SCSI connections,  
For both internal and external SCSI connections,  
For connections to both internal connectors, and  
For an internal connection to another SYM22801, or any connection  
to a device using the same sensing method for automatic termination  
as your SYM22801.  
2.3.1 Internal SCSI Connections  
If only internal SCSI device connections to the host adapter have been  
made, you must terminate the last internal device on the SCSI bus. You  
must disable the termination on all other devices. Termination on the host  
adapter is automatically enabled in this case.  
SCSI Bus Termination  
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Figure 2.14 shows an example of how termination is determined for this  
SCSI bus configuration.  
Figure 2.14 Internal SCSI Device Termination  
2.3.2 External SCSI Connections  
If only external SCSI device connections to the host adapter have been  
made, you must terminate the last external device on the SCSI bus. You  
must disable the termination on all other devices. Termination on the host  
adapter is automatically enabled in this case.  
Figure 2.15 shows an example of how termination is determined for this  
SCSI bus configuration.  
2-20  
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Figure 2.15 External SCSI Device Termination  
Last D evice  
on Chain -  
Term ination  
Enabled  
Does N ot  
End Chain -  
Term ination  
Disabled  
H ost Adapter  
Autom atically  
Term inated  
2.3.3 Internal and External SCSI Connections  
If you have internal and external SCSI device connections to the host  
adapter, you must terminate the last internal and external devices on the  
SCSI bus. You must disable the termination on all other devices.  
Termination on the host adapter is automatically disabled in this case.  
Figure 2.16 shows an example of how termination is determined for this  
SCSI bus configuration.  
SCSI Bus Termination  
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Figure 2.16 Internal and External SCSI Device Termination  
Last Device  
on Chain  
Term ination  
Enabled  
H ost Adapter  
Term ination  
Autom atically  
Disabled  
Does N ot  
End Chain  
Term ination  
Disabled  
Last Device  
on Chain  
Term ination  
Enabled  
2.3.4 Internal SCSI Connections for Both Internal Connectors  
If you have internal SCSI device connections to both internal connectors  
of a channel, you must terminate the internal devices on each end of the  
SCSI bus. You must disable the termination on all other devices.  
Termination on the host adapter is automatically disabled in this case.  
Caution:  
Remember, you must not use the external connector for a  
channel if you use both internal connectors for that  
channel.  
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Figure 2.17 shows an example of how termination is determined for this  
SCSI bus configuration. If you connect the SYM22801 in the middle of  
the bus, you will incur improper termination since the switches are not  
assigned on that bus correctly.  
Figure 2.17 Internal and Internal SCSI Device Termination  
Last Devices  
on Chain -  
Termination  
Enabled  
Does Not  
End Chain -  
Termination  
Disabled  
Host Adapter  
Automatically  
Terminated  
If you have an internal connection to another SYM22801 host adapter,  
or any connection to a device that uses the same sensing method for  
automatic termination as your SYM22801, you must properly set the  
termination override switches U1 or U2 (see Figure 2.1).  
2.3.4.1 Channel Switches  
When connecting another SYM22801, you must turn on the switch for  
the connector used on one or both of the boards. Please refer to  
Figure 2.18, and the next two paragraphs, to determine the correct  
switch setting.  
SCSI Bus Termination  
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Four switches for each channel provide cable detection simulation and  
forced upper line termination. Switch one simulates a device on the  
internal 50-pin connector, switch two simulates a device on the internal  
68-pin connector, switch three forces the upper SCSI line terminator to  
stay on, and switch four simulates a device on the external 68-pin  
connector.  
When SYM22801 is in the middle of a bus using only one connector,  
then switch Int68 and Ext68 (switches 2 and 4) for that bus are on. This  
forces the terminators for that bus to be disabled.  
2-24  
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Figure 2.18 Termination Override Switch Settings for U1 and U2  
1
Default setting. Autotermination will  
work as designed.  
2
3
4
1-INT50  
1
2
Simulates a device on the Internal 50 pin  
connector. Use this switch only when a  
device is connected to the internal 50 pin  
connector that does not ground pin 22,  
like another LSI Logic host adapter.  
3
4
2-INT68  
Simulates a device on the Internal 68 pin  
connector. Use this switch only when a  
device is connected to the internal 68 pin  
connector that does not ground pin 50,  
like another LSI Logic host adapter.  
1
2
3
4
3-UPPER TERM  
Forces termination ON the upper data  
lines. Use this switch when a narrow 8-bit  
device is connected to one of the 68 pin  
connectors.  
1
2
3
4
Simulates a device on the External 68 pin  
connector. Use this switch only when a  
device is connected to the external 68 pin  
connector that does not ground pin 50,  
like another LSI Logic host adapter.  
1
2
3
4
4-EXT68  
2.3.5 Setting SCSI IDs  
You must set each SCSI device and the host adapter to a separate SCSI  
ID, 0 through 15. SCSI ID 7 is the preset host adapter setting, giving it  
the highest priority on the SCSI bus. If you plan to boot your computer  
from a SCSI hard disk drive on the SCSI bus, that drive should have  
SCSI ID 0, or the lowest SCSI ID on the bus. Chapter 3, Configuring the  
Host Adapter, explains how to set the host adapter ID using the Symbios  
SCSI Configuration utility.  
SCSI Bus Termination  
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The peripheral device SCSI IDs are usually set with jumpers or with a  
switch on the peripheral. Refer to the peripheral manufacturer’s  
instructions and to the user’s manual for your computer to determine the  
ID of each device and how to change it. You must have no duplication  
of SCSI IDs on a SCSI bus.  
Step 1. Determine the SCSI ID of each device on the SCSI bus. Note  
any duplications and if 8-bit SCSI devices are to be used, the  
host adapter ID must not be set above 7.  
Step 2. Make any necessary changes to the SCSI IDs and record the  
IDs for future reference. The following table is provided as a  
place to keep this record.  
Table 2.1  
SCSI ID  
SCSI ID Record  
SCSI Device  
15  
14  
13  
12  
11  
10  
9
8
7
SYM22801 Host Adapter (default)  
6
5
4
3
2
1
0
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2.4 Setting Interrupts  
You should not normally have to change the default interrupt routing for  
the SYM22801, since performance is usually increased by having two  
separate interrupts. However, if your system does not support two  
separate interrupts, jumper TP9 (see Figure A.1) is provided to change  
the interrupt routing. The following table explains the jumper settings:  
Table 2.2  
Setting Interrupts  
Jumper  
Setting  
Condition  
Jumper Out  
(default)  
INTB/ is routed to INTB/ on the PCI bus  
Jumper In  
INTB/ is rerouted at power up to INTA/ on the  
PCI bus  
Setting Interrupts  
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2.5 Completing Your Installation  
Before replacing the cover on your computer, review this installation  
procedure check list. This will save you effort later.  
Verify Installation Procedures  
Done  
Host adapter connection in PCI bus slot secure  
Internal SCSI bus connections secure (pin-1 continuity)  
External SCSI bus connections secure  
Proper SCSI bus termination established  
Unique SCSI IDs set and recorded for each device  
Step 1. Replace the cabinet cover on your computer.  
Step 2. Plug in all power cords, and switch on power to all devices and  
your computer.  
Step 3. Wait for your computer to boot up.  
Step 4. To change the configuration of your host adapter, see  
Chapter 3, Configuring the Host Adapter.  
Step 5. Finally, refer to the PCI SCSI Device Management System  
SDMS 4.0 User’s Guide (or the guide for the software you plan  
to use) to load the driver software for your particular operating  
system.  
2-28  
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Chapter 3  
Configuring the Host Adapter  
This chapter discusses how to change configuration settings and  
includes these topics:  
Section 3.1, “When to Configure the SYM22801 Host Adapter,”  
page 3-1  
Section 3.2, “Starting the SCSI BIOS Configuration Utility,” page 3-2  
Section 3.3, “Exiting the SCSI BIOS Configuration Utility,” page 3-13  
3.1 When to Configure the SYM22801 Host Adapter  
In most cases you should not need to change the default configuration  
of your host adapter. You may decide to alter these default values if there  
is a conflict between device settings, or if you need to optimize system  
performance.  
The following tables list the configuration settings you can change. The  
global settings affect your host adapter and all SCSI devices which are  
connected to it. The device settings affect only individual SCSI devices.  
Table 3.1  
Global Default Settings  
Settings for the Host Adapter and All Devices  
Default Settings  
1
SCAM Support  
Parity Checking  
Host Adapter SCSI ID  
Scan Order  
Off  
Enabled  
7
Low to High  
(0-Max)  
1. Applies to BIOS version 4.09 and later.  
Symbios SYM22801 Dual Channel PCI to Ultra SCSI Host Adapter  
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Table 3.2  
Device Default Settings  
Settings for Individual SCSI Devices  
Default Settings  
Synchronous Transfer Rate (Mbytes/s)  
Data Width  
40  
16  
Disconnect  
On  
10  
Read/Write I/O Time-out (seconds)  
Scan for Devices at Boot Time  
Scan for SCSI LUNs  
Queue Tags  
Yes  
Yes  
On  
3.2 Starting the SCSI BIOS Configuration Utility  
If you have SCSI BIOS version 4.xx, and it includes the Symbios SCSI  
BIOS Configuration Utility, you can change the default configuration of  
your SCSI host adapters. You may decide to alter these default values if  
there is a conflict between device settings or if you need to optimize  
system performance.  
The version number of the SCSI BIOS appears in a banner displayed on  
your computer monitor during boot. If the utility is available, the following  
message also appears on your monitor:  
Press Ctrl-C to start Symbios Configuration Utility...  
This message remains on your screen for about five seconds, giving you  
time to start the utility. If you decide to press “Ctrl-C,” the message  
changes to:  
Please wait, invoking Symbios Configuration Utility...  
After a brief pause, your computer monitor displays the Main Menu of the  
Symbios SCSI BIOS Configuration Utility.  
NVRAM (Non Volatile Random Access Memory) is available on the  
SYM22801 host adapter. Changes can be made and stored to NVRAM  
using this menu driven utility.  
3-2  
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Important:  
This SCSI BIOS Configuration Utility is a powerful tool. If,  
while using it, you somehow disable all of your controllers,  
pressing Ctrl-A (or Ctrl-E on version 4.04 or later) after  
memory initialization during reboot allows you to re-enable  
and reconfigure.  
Not all devices detected by the Configuration Utility can be  
controlled by the BIOS. Devices such as tape drives and  
scanners require that a device driver specific to that  
peripheral be loaded. The device manufacturer provides  
the device drivers.  
3.2.1 Configuration Utility Main Menu  
When you start the Symbios SCSI BIOS Configuration Utility, the Main  
Menu appears. This menu displays a list of up to four Symbios PCI to  
SCSI host adapters in your system and information about each of them.  
The SYM22801 host adapter appears on the menu as two SYM53C875  
entries; one for each channel. To select an adapter, use only the arrow  
keys and enter key. Then, you can view and/or change the current  
settings for that adapter and the SCSI devices attached to it.  
You can select an adapter only if Current Status is “On”. Changes are  
possible since NVRAM is present on this host adapter.  
Here is an example of the Main Menu:  
Main Menu  
Port Irq---------Status--------NVRAM  
Num  
Level Current Next-Boot Found  
SYM53C875 FC00 9  
SYM53C875 F800 9  
SYM53C895 F801 9  
On  
On  
On  
On  
Off  
Off  
Yes  
Yes  
Yes  
Change Adapter Status  
Adapter Boot Order  
Additional Adapter Configuration  
Display Mode = Verbose  
Mono/Color  
Language  
Help  
Quit  
Starting the SCSI BIOS Configuration Utility  
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Below the list of host adapters on the Main Menu display, you see eight  
options. They are described in detail below. If these settings are altered,  
the system will reboot after the Quit option is selected, which allows the  
user to exit from the Configuration Utility.  
3.2.1.1 Change Adapter Status  
The change adapter status allows the user to activate or deactivate a  
host adapter and all SCSI devices attached to it. When this option is  
used to make a change, the change takes place after a reboot upon exit  
from the utility. Here is an example of the Change Status on Next Boot  
Menu:  
Main Menu  
Change Status on Next Boot:  
Port Irq---------Status--------NVRAM  
Num  
Level Current Next-Boot Found  
SYM53C875 FC00 9  
SYM53C875 F800 9  
SYM53C895 F801 9  
On  
On  
On  
On  
Off  
Off  
Yes  
Yes  
Yes  
To change an adapter's status, select it and press Enter. Press the  
Escape (Esc) key to exit from this menu.  
3.2.1.2 Adapter Boot Order  
The adapter boot order allows the user to set the order in which host  
adapters will boot when you have more than one LSI Logic host adapter  
in your system. When this option is selected, the Boot Order menu  
appears. Here is an example of the Boot Order Menu:  
Main Menu  
BootSeq  
Bus DevFunc BootSeq  
Bus DevFunc  
SYM53C875 00 98  
0 SYM53C875 00 A0  
2 SYM53C895 00 90  
1
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To change an adapter's boot order, select it and press Enter. You are  
then prompted to enter the new boot sequence number. To remove an  
adapter's boot order, press Enter again rather than entering a new  
sequence number. While the maximum capacity is 32 adapters, only four  
adapters can be assigned a boot order starting with boot sequence  
number zero (0). If an invalid number is entered, an error message  
appears. When the adapters are ordered as desired, press the Escape  
(Esc) key to exit from this menu.  
3.2.1.3 Additional Adapter Configuration  
The additional adapter configuration allows the user to configure an  
adapter that is not assigned a boot order. When this option is selected,  
the Adapter Configuration menu appears. Here is an example of the  
Adapter Configuration Menu:  
Main Menu  
BootSeq  
Bus DevFunc BootSeq  
Bus DevFunc  
SYM53C875 00 98  
1 SYM53C875 00 A0  
SYM53C895  
0
Highlight the adapter to be configured and press Enter. The message  
“Resetting Adapter, Please wait” appears, and then the system scans for  
devices. Finally, the Utilities Menu appears and lists the available  
options, which are described below.  
3.2.1.4 Display Mode  
The Display Mode option determines how much information about your  
host adapters and SCSI devices appear on your computer monitor during  
boot. For more complete information, choose the verbose setting. For a  
faster boot, choose the terse setting.  
3.2.1.5 Mono/Color  
The Mono/Color option allows a choice between a monochrome or color  
display for the SCSI BIOS Configuration Utility. You might need to  
choose the mono/color setting to get a more readable screen on a  
monochrome monitor.  
Starting the SCSI BIOS Configuration Utility  
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3.2.1.6 Language  
If enabled, the Language option allows you to select from five languages  
for the configuration utility: English, German, French, Italian, and  
Spanish.  
3.2.1.7 Help  
3.2.1.8 Quit  
3.2.1.9 Esc  
The Help option allows the user to bring up a help screen with  
information about the Main Menu.  
The Quit option allows exiting from the SCSI BIOS Configuration Utility  
when the Main Menu is displayed.  
The Esc option allows exiting from all the screens except the Main Menu.  
3.2.2 Utilities Menu  
When you select a host adapter on the Main menu, the Utilities menu  
appears as shown below:  
SYM53C875  
Adapter Setup  
Device Selections  
Help  
Exit this menu  
Choose Adapter Setup to view and change the selected adapter settings.  
Choose Device Selections to view and change settings for the devices  
attached to the selected adapter.  
You are returned to this menu after making changes to the configuration  
of any host adapter or connected SCSI device. Before you exit this  
menu, you are prompted to save or cancel any changes.  
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3.2.2.1 Adapter Setup Menu  
When you select Adapter Setup, the corresponding menu appears. Here  
is an example of the Adapter Setup Menu:  
Adapter Setup  
SCAM Support  
Parity  
Off  
Enabled  
Host SCSI ID  
Scan Order  
7
Low to High <0..Max>  
Removable Media Support None  
CHS Mapping  
SCSI Plug & Play Mapping  
Spinup Delay (sec)  
Help  
2
Restore Default Setup  
Exit this menu  
The settings in this menu are global settings that affect the selected host  
adapter and all SCSI devices attached to it. One of these choices can  
be selected by highlighting it and pressing Enter.  
SCAM Support The Symbios BIOS version 4.xx and above supports  
the SCSI Plug and Play protocol called SCAM (SCSI Configured  
AutoMatically). SCAM support by default is off in adapter BIOS versions  
4.09 and later for the SYM53C876 device. The user may choose to turn  
this on only if the system drivers do not require SCAM off. Note that if  
this BIOS is flashed onto a board with existing settings, then these  
settings will not be changed to reflect the new BIOS defaults. Go into the  
Configuration Utility to change these settings.  
Parity – The Symbios PCI to SCSI host adapters always generate  
parity, but some older SCSI devices do not. Therefore, you are offered  
the option of disabling parity checking.  
Starting the SCSI BIOS Configuration Utility  
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Note:  
When disabling parity checking, it is also necessary to  
disable disconnects for all devices, as parity checking for  
the reselection phase is not disabled. If a device does not  
generate parity, and it disconnects, the I/O never completes  
because the reselection never completes.  
Host SCSI ID This option refers to the host adapter’s SCSI ID, which  
is a unique number used to identify the device on the SCSI bus.  
Note:  
In general, it is suggested that the user not change the host  
adapter ID from the default value of 7, as this gives it the  
highest priority on the SCSI bus. Please also note that if  
you have 8-bit SCSI devices (narrow), they cannot see host  
IDs greater than 7.  
Scan Order This option allows the user to tell the SCSI BIOS and  
device drivers to scan the SCSI bus from low to high (0 to max) SCSI  
ID, or from high to low (max to 0) SCSI ID. If there is more than one  
device on the SCSI bus, changing the scan order changes the order in  
which drive letters are assigned by the system. Drive order may be  
reassigned differently in systems supporting the BIOS Boot Specification  
(BBS).  
See the PCI SCSI Device Management System SDMS 4.0 User’s Guide,  
Chapter 2, “SCSI BIOS” for additional information regarding BBS.  
Note:  
This scan order option may conflict with operating systems  
that automatically assign a drive order.  
Removable Media Support This option defines the removable media  
support for a specific drive. When this option is selected, a window  
appears with three choices:  
None  
Boot Drive Only  
With Media Installed  
None indicates there is no removable media support whether the drive  
is selected in BBS as being first, or first in scan order in non-BBS.  
Boot Drive Only provides removable media support for a removable  
hard drive if it is first in the scan order.  
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With Media Installed provides removable media support wherever the  
drive(s) actually resides.  
One of these choices can be selected by highlighting it and pressing  
Enter.  
CHS Mapping This option defines the cylinder head sector (CHS)  
values that will be mapped onto a disk without pre-existing partition  
information. SCSI Plug and Play Mapping is the default value.  
To support interchange with non-compatible systems, there is another  
option that can be selected by choosing CHS Mapping and then  
cursoring to “Alternate CHS Mapping”.  
Note:  
Neither of these options will have any effect after the disk  
has been partitioned with the FDISK command.  
To remove partitioning, two options are available:  
Reformat the disk using the Format Device option. See the “Device  
Selections Menu” section below for further details regarding this  
option.  
Use the FDISK /MBR command at the C:\ prompt, where MBR  
represents master boot record.  
Important:  
Reformatting the disk or using FDISK /MBR erases all  
partitioning and data that exists. Be careful that you target  
the correct disk when using either the Format utility or the  
FDISK /MBR command.  
After clearing the partitions and data, it is necessary to  
reboot and clear memory or the old partitioning data will be  
reused, thus nullifying the previous operation.  
Spinup Delay (seconds) – This option allows the user to stagger spin  
ups for a longer period of time to balance the total current load. The  
default value is 2 seconds with choices between 1 and 10 seconds.  
This is a power management device designed to accommodate disk  
devices that may have heavy current load during power up. If multiple  
drives are being powered up simultaneously and drawing heavy current  
loads, then this option staggers the spin ups to limit start-up current.  
Starting the SCSI BIOS Configuration Utility  
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3.2.3 Device Selections Menu  
When you select the Device Selections option, the corresponding menu  
appears:  
Device Selections 0-7  
Sync Data Disc Time  
Rate Width Out Bus LUNS Tags Boot  
0-Dev0 N/A 40 16  
Scan  
Queue Initial  
On 10 Yes Yes On  
On 10 Yes Yes On  
On 10 Yes Yes On  
On 10 Yes Yes On  
On 10 Yes Yes On  
On 10 Yes Yes On  
On 10 Yes Yes On  
On 10 Yes Yes On  
No  
No  
No  
No  
No  
No  
No  
No  
1-Dev1 N/A 40 16  
2-Dev2 N/A 40 16  
3-Dev3 N/A 40 16  
4-Dev4 N/A 40 16  
5-Dev5 N/A 40 16  
6-Dev6 N/A 40 16  
SYM53C875 40 16  
Device Selections 8-15  
Help  
Exit this menu  
The settings in this menu affect individual SCSI devices attached to the  
selected host adapter. Changes made from this menu do not cause the  
system to reboot upon exit from the SCSI BIOS Configuration Utility. To  
change a value, select the required device by using the arrow keys and  
press Enter. A new menu appears providing the options and utilities  
available. For example, you could select the Sync Rate option to change  
the Sync Rate value of the chosen device  
3-10  
Configuring the Host Adapter  
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.
SYM53C875  
Inside device  
Sync Rate  
Width  
Disconnect  
Read/Write I/O Timeout  
Scan for Device at Boot Time  
Scan for SCSI LUNs  
Queue Tags  
Initial Boot  
Format  
Verify  
Help  
Restore Default Setup  
Exit this menu  
Please review the descriptions of each option below before changing any  
values.  
Sync Rate (Mbytes/s) –  
This option defines the maximum data  
transfer rate the host adapter will attempt to negotiate. The host adapter  
and a SCSI device must agree to a rate they can both handle.  
Width (bits) –  
This option defines the maximum SCSI data width the  
host adapter will attempt to negotiate. The host adapter and a SCSI  
device must agree to a width they can both handle. Only host adapters  
that can do 16-bit data transfers have this option enabled.  
Starting the SCSI BIOS Configuration Utility  
3-11  
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Disconnect – SCSI devices have the ability to disconnect from the  
initiator during an I/O transfer. This disconnect option frees the SCSI Bus  
to allow other I/O processes. This option tells the host adapter whether  
or not to allow a device to disconnect. Some devices run faster with  
disconnects enabled (mostly newer devices), while some run faster with  
disconnects disabled (mostly older devices).  
Read Write I/O Time-out (seconds) This option sets the amount of  
time the host adapter waits for a read, write, or seek command to  
complete before trying the I/O transfer again. Since this provides a  
safeguard allowing the system to recover if an I/O operation fails, it is  
recommended that you always set the time-out to a value greater than  
zero.  
Note:  
A zero value allows unlimited time for an operation to  
complete and could result in the system being hung-up.  
Scan for Device at Boot Time Set this option to “No” if there is a  
device that you do not want to be available to the system. Also, on a bus  
with only a few devices attached, you can speed up boot time by  
changing this setting to “No” for all unused SCSI IDs.  
Scan for SCSI Logical Units (LUNs) Set this option to “No” if  
problems arise with a device that responds to all LUNs whether they are  
occupied or not. For example, if a SCSI device with multiple LUNs is  
present on your system but you do not want all of those LUNs to be  
available to the system, then set this option to “No.” This will limit the  
scan to LUN 0 only.  
Queue Tags If the device driver has the capability, this option allows  
the user to enable or disable the issuing of queue tags during I/O  
requests.  
Initial Boot – This option allows any device attached to the first adapter  
to become the boot device. It provides the users of non-BBS personal  
computers with some of the flexibility of a BBS machine.  
Format Device – If enabled, this option allows the user to low-level  
format a magnetic disk drive. Low-level formatting will completely and  
irreversibly erase all data on the drive. Formatting will default the drive  
to a 512-byte sector size even if the drive had previously been formatted  
to another sector size.  
3-12  
Configuring the Host Adapter  
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Verify – This option allows the user to read all the sectors on a disk  
looking for errors. When selected, this option displays the following  
message:  
“Verify all sectors on the device  
Press ESC to abort  
Else press any key to continue”  
Help – This option brings up a help screen with information about the  
Device Selections Menu.  
Restore Default Setup This option resets all device selections back  
to their default settings. Select this option to restore all manufacturing  
defaults for the specified adapter. Note that all user customized options  
will be lost upon saving after restoring default setup.  
Exit this menu This option allows the user to leave the Device  
Selections Menu and return to the previous screen.  
3.3 Exiting the SCSI BIOS Configuration Utility  
Since some changes only take effect after the system reboots, it is  
important that the user exit from this SCSI BIOS Configuration Utility  
properly. Return to the Main Menu and exit via the Quit option. Rebooting  
the system without properly exiting from this utility may cause some  
changes to not take effect.  
Exiting the SCSI BIOS Configuration Utility  
3-13  
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3-14  
Configuring the Host Adapter  
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Appendix A  
Technical Specifications  
This section discusses the physical environment associated with the  
SYM22801 Host Adapter. It includes a mechanical drawing of this board,  
which is shown in Figure A.1. It also includes these topics:  
Section A.1, “Physical Environment,” page 1-1  
Section A.2, “Electrical Characteristics,” page 1-2  
Section A.3, “Operational Environment,” page 1-3  
A.1 Physical Environment  
This section discusses the physical, electrical, thermal, and safety  
characteristics of the SYM22801 Host Adapter board. Additionally, this  
board is compliant with electromagnetic standards set by the FCC.  
A.1.1 Physical Characteristics  
The dimensions of the SYM22801 host adapter board are 7.50” x 3.80”.  
PCI connection is made through the edge connector J1. Internal 16-bit  
SCSI connection is made through the 68-pin high density connectors J2  
or J6. Internal 8-bit SCSI connection is made through the 50-pin low  
density connectors J4 or J8. External SCSI connection is made through  
the 68-pin VHDCI connectors J3 or J7. The J3 and J7 connectors  
extend through the ISA/EISA bracket, which is attached to the face of  
the connector outside the cabinet where the SYM22801 is installed.  
The bracket is a standard ISA type with a cutout to accommodate the  
connectors. The J5 and J9 connectors are for connecting the computer’s  
Busy LED. It is a 4-pin one row right angle header wired in parallel with  
the on-board LED. The component height on the top and bottom of the  
board follows the PCI specification.  
A-1  
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Figure A.1 SYM22801 Mechanical Drawing  
190.50(REF) (7.50(REF))  
J2  
J6  
J5  
J9  
U1  
J8  
U2  
J4  
J3  
TERMPWR  
Fail LED  
TERMPWR  
Fail LED  
NVRAM  
NVRAM  
FLASH  
EEPROM  
SYM53C876  
J7  
TP9  
J1  
A.2 Electrical Characteristics  
The SYM22801 maximum power requirements, including SCSI  
TERMPWR, under normal operation are as follows:  
+ 5 V DC  
+ 12 V  
±5%  
1.5 A  
Over the operating range 0–55 °C  
±0.6 V 50 mA  
Over the operating range 0–55 °C  
+ 3.3 V  
±0.3 V 130 mA Over the operating range 0–55 °C  
when operating in a 3.3 V PCI slot  
Under abnormal conditions such as a short on SCSI TERMPWR, + 5 V  
current may be higher. At temperatures of at least 25 °C a current of  
4 A is sustained no longer than 30 seconds before the self-resetting  
TERMPWR short circuit protection device opens.  
The PCI PRSNT1#and PRSNT2# pins are set to indicate a 15 W  
maximum configuration.  
A-2  
Technical Specifications  
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A.2.1 Thermal, Atmospheric Characteristics  
The board is designed to operate in an environment defined by the  
following parameters:  
Temperature range: 0–55 °C (dry bulb)  
Relative humidity range: 0–90% (noncondensing)  
Maximum dew point temperature: 32 °C  
A.2.2 Electromagnetic Compliance  
The board is designed and implemented to minimize electromagnetic  
emissions, susceptibility, and the effects of electromagnetic discharge.  
The board meets the requirements of FCC and CISPR Class B limits and  
is marked with the FCC Self Certification logo. It also carries the CE  
mark.  
A.2.3 Safety Characteristics  
The bare board meets or exceeds the requirements of UL flammability  
rating 94 V0. The bare board is also marked with the supplier’s name or  
trademark, type, and UL flammability rating. Since this board is installed  
in a PCI bus slot, all voltages are below the SELV 42.4 V limit.  
A.3 Operational Environment  
The SYM22801 is designed for use in PCI computer systems with an  
ISA/EISA bracket type. The Symbios SDMS™ (SCSI Device  
Management System) software operates the board, but the design of the  
board does not prevent the use of other software.  
A.3.1 The PCI Interface  
The PCI interface operates as a 32-bit DMA bus master. The connection  
is made through the edge connector J1, which provides connections on  
both the front and back of the board. The signal definitions and pin  
numbers conform to the PCI Local Bus Specification Revision 2.1  
standard. The following tables show the signal assignments.  
Operational Environment  
A-3  
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Note:  
The + 3.3 V pins are tied together and decoupled with high  
frequency bypass capacitors to ground. No current from  
these 3.3 V pins is used on the board. The PCI portion of  
the SYM53C876 chip is powered from the 3 V/5 V pins.  
Table A.1  
PCI Connector J1 (Front)1  
Signal Name  
Pin  
Signal Name  
Pin  
Signal Name  
Pin  
12 V  
TCK  
1
2
GND  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
+3.3 V  
C_BE1/  
AD14  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
58  
59  
60  
61  
62  
AD27  
GND  
3
AD25  
TDO  
4
+3.3 V  
C_BE3/  
AD23  
GND  
+5 V  
5
AD12  
+5 V  
6
AD10  
INTB/  
7
GND  
GND  
INTD/  
8
AD21  
KEYWAY  
KEYWAY  
AD08  
GND (PRSNT1/)  
RESERVED  
GND (PRSNT2/)  
KEYWAY  
KEYWAY  
RESERVED  
GND  
9
AD19  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
+3.3 V  
AD17  
AD07  
C_BE2/  
GND  
+3.3 V  
AD05  
IRDY/  
+3.3 V  
DEVSEL/  
GND  
AD03  
GND  
CLK  
AD01  
GND  
3 V/5 V  
ACK64/  
+5 V  
REQ/  
LOCK/  
PERR/  
+3.3 V  
SERR/  
3 V/5 V  
AD31  
+5 V  
AD29  
1.  
Shaded signals are not connected.  
A-4  
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Table A.2  
PCI Connector J1 (Back)1  
Signal Name  
Pin  
Signal Name  
Pin  
Signal Name  
PAR  
Pin  
TRST/  
1
2
AD28  
AD26  
GND  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
58  
59  
60  
61  
62  
+12 V  
AD15  
TMS  
3
+3.3 V  
AD13  
TDI  
4
AD24  
IDSEL  
+3.3 V  
AD22  
AD20  
GND  
+5 V  
5
AD11  
INTA/  
6
GND  
INTC/  
7
AD09  
+5 V  
8
KEYWAY  
KEYWAY  
C_BE0/  
+3.3 V  
AD06  
RESERVED  
3 V/5 V  
RESERVED  
KEYWAY  
KEYWAY  
RESERVED  
RST/  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
AD18  
AD16  
+3.3 V  
FRAME/  
GND  
AD04  
GND  
TRDY/  
GND  
AD02  
3 V/5 V  
GNT/  
AD00  
STOP/  
+3.3 V  
SDONE  
SBO/  
3 V/5 V  
REQ64/  
+5 V  
GND  
RESERVED  
AD30  
+5 V  
+3.3 V  
GND  
1.  
Shaded signals are not connected.  
Operational Environment  
A-5  
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A.3.2 The SCSI Interface  
The SCSI interface operates as 8-bit or 16-bit, synchronous or  
asynchronous, single-ended bus, and supports SCSI-2 protocols and  
16-bit arbitration. The interface is made through connectors J2, J3 and  
J4 for channel A. Channel B connectors are J6, J7, and J8. Connectors  
J2 and J6 are 68-pin high density right angle receptacles for internal  
connections. Connectors J3 and J7 are 68-pin VHDCI right angle  
receptacles that protrude through the back panel bracket. Connectors J4  
and J8 are 50-pin low density vertical shrouded headers used for internal  
SCSI connections.  
Note:  
Up to two (and only two) connections are allowed on each  
channel. Connecting to all three connectors on a channel  
will result in an unreliable configuration.  
Active single-ended SCSI termination is provided automatically. SCSI  
termination power is also supplied by the board. The following tables  
show the signal assignments for J2/J6, J3/J7, and J4/J8.  
A-6  
Technical Specifications  
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Table A.3  
SCSI Connectors J2/J6 and J3/J7  
Signal Name  
Pin  
Signal Name  
GND  
Pin  
Signal Name  
Pin  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
1
2
3
4
5
6
7
8
9
24 SD7/  
47  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
25 SDP/  
26 GND  
1
27 CPRSNT_A-B/  
28 TERMPWR  
29 TERMPWR  
30 N/C  
31 GND  
32 SATN/  
33 GND  
10 GND  
11 GND (J2/J6)  
34 SBSY/  
GND/16CBLSNS  
(J3/J7)  
GND  
12 SD12/  
13 SD13/  
14 SD14/  
15 SD15/  
16 SDP1/  
17 SD0/  
18 SD1/  
19 SD2/  
20 SD3/  
21 SD4/  
22 SD5/  
23 SD6/  
35 SACK/  
36 SRST/  
37 SMSG/  
38 SSEL/  
39 SC_D/  
40 SREQ/  
41 SI_O/  
42 SD8/  
43 SD9/  
44 SD10/  
45 SD11/  
46  
58  
59  
60  
61  
62  
63  
64  
65  
66  
67  
68  
GND  
GND  
GND  
GND  
TERMPWR  
TERMPWR  
N/C  
GND  
GND  
GND  
GND  
1. CPRSNT_A/(J2/J6) and CPRSNT_B/(J3/J7) are used to sense the  
connection of a standard SCSI device by sensing SCSI standard GND on this  
pin.  
Operational Environment  
A-7  
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Table A.4  
SCSI Connectors J4/J8  
Signal Name  
Pin  
Signal Name  
Pin  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
N/C  
1
SD0/  
2
3
SD1/  
4
5
SD2/  
6
7
SD3/  
8
9
SD4/  
10  
12  
14  
16  
18  
20  
22  
24  
26  
28  
30  
32  
34  
36  
38  
40  
42  
44  
46  
48  
50  
11  
13  
15  
17  
19  
21  
23  
25  
27  
29  
31  
33  
35  
37  
39  
41  
43  
45  
47  
49  
SD5/  
SD6/  
SD7/  
SDP/  
GND  
1
CPRSNT_C/  
N/C  
N/C  
TERMPWR  
N/C  
N/C  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
SATN/  
GND  
SBSY/  
SACK/  
SRST/  
SMSG/  
SSEL/  
SC_D/  
SREQ/  
SI_O/  
1. CPRSNT_C/is used to sense the connection of a standard  
SCSI device by sensing SCSI standard GND on this pin.  
A-8  
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A.3.3 The LED Interface  
The LED interface on the SYM22801 is a four-wire arrangement that  
allows the user to connect an LED harness to the board. The  
GPIO0_FETCH line (maximum output low voltage 0.4 V and minimum  
output low current 16 mA) is pulled low to complete the circuit when a  
harness with an LED is attached. The connectors on the SYM22801 are  
J5 and J9.  
Table A.5  
Signal Name  
LED+  
LED Connectors J5/J9  
Pin  
1
2
3
4
LED−  
LED−  
LED+  
Operational Environment  
A-9  
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A-10  
Technical Specifications  
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Appendix B  
Glossary of Terms and  
Abbreviations  
Address  
A specific location in memory, designated either numerically or by a  
symbolic name.  
Asynchronous  
Data Transfer  
A method of transmission which does not require a common clock, but  
separates fields of data by stop and start bits. It is slower than  
synchronous data transfer.  
BIOS  
Basic Input/Output System. Software that provides basic read/write  
capability. Usually kept as firmware (ROM based). The system BIOS on  
the mainboard of a computer is used to boot and control the system. The  
SCSI BIOS on your host adapter acts as an extension of the system  
BIOS.  
Bit  
A binary digit. The smallest unit of information a computer uses. The  
value of a bit (0 or 1) represents a two-way choice, such as on or off,  
true or false, and so on.  
Bus  
A collection of unbroken signal lines across which information is  
transmitted from one part of a computer system to another. Connections  
to the bus are made via taps on the lines.  
Bus Mastering  
A high-performance way to transfer data. The host adapter controls the  
transfer of data directly to and from system memory without bothering the  
computer’s microprocessor. This is the fastest way for multitasking  
operating systems to transfer data.  
Byte  
A unit of information consisting of eight bits.  
Chain  
A topology in which every processor is connected to two others, except  
for two end processors that are connected to only one other.  
CISPR  
A special international committee on radio interference (Committee,  
International and Special, for Protection in Radio).  
Glossary of Terms and Abbreviations  
B-1  
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Configuration  
Refers to the way a computer is set up; the combined hardware  
components (computer, monitor, keyboard, and peripheral devices) that  
make up a computer system; or the software settings that allow the  
hardware components to communicate with each other.  
CPU  
DMA  
Central Processing Unit. The “brain” of the computer that performs the  
actual computations. The term Micro Processor Unit (MPU) is also used.  
Direct Memory Access. A method of moving data from a storage device  
directly to RAM, without using the CPU’s resources.  
DMA Bus  
Master  
A feature that allows a peripheral to control the flow of data to and from  
system memory by blocks, as opposed to PIO (Programmed I/O) where  
the processor is in control and the flow is by byte.  
Device Driver  
Differential  
A program that allows a microprocessor (through the operating system)  
to direct the operation of a peripheral device.  
A hardware configuration for connecting SCSI devices. It uses a pair of  
lines for each signal transfer (as opposed to single-ended SCSI which  
references each SCSI signal to a common ground).  
Dword  
A double word is a group of 4 consecutive bytes or characters that are  
stored, addressed, transmitted, and operated on as a unit. The lower two  
address bits of the least significant byte must equal zero in order to be  
dword aligned.  
EEPROM  
EISA  
Electronically-Erasable Programmable Read Only Memory. A memory  
chip typically used to store configuration information. See NVRAM.  
Extended Industry Standard Architecture. An extension of the 16-bit ISA  
bus standard. It allows devices to perform 32-bit data transfers.  
External SCSI  
Device  
A SCSI device installed outside the computer cabinet. These devices are  
connected in a continuous chain using specific types of shielded cables.  
Fast SCSI  
A standard for SCSI data transfers. It allows a transfer rate of up to  
10 Mbytes/s over an 8-bit SCSI bus and up to 20 Mbytes/s over a 16-bit  
SCSI bus.  
FCC  
File  
Federal Communications Commission.  
A named collection of information stored on a disk.  
B-2  
Glossary of Terms and Abbreviations  
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Firmware  
Hard Disk  
Host  
Software that is permanently stored in ROM. Therefore, it can be  
accessed during boot time.  
A disk made of metal and permanently sealed into a drive cartridge. A  
hard disk can store very large amounts of information.  
The computer system in which a SCSI host adapter is installed. It uses  
the SCSI host adapter to transfer information to and from devices  
attached to the SCSI bus.  
Host Adapter  
A circuit board or integrated circuit that provides a SCSI bus connection  
to the computer system.  
Internal SCSI  
Device  
A SCSI device installed inside the computer cabinet. These devices are  
connected in a continuous chain using an unshielded ribbon cable.  
IRQ  
Interrupt Request Channel. A path through which a device can get the  
immediate attention of the computer’s CPU. The PCI bus assigns an IRQ  
path for each SCSI host adapter.  
ISA  
Industry Standard Architecture. A type of computer bus used in most  
PC’s. It allows devices to send and receive data up to 16-bits at a time.  
Kbyte  
Kilobyte. A measure of computer storage equal to 1024 bytes.  
Local Bus  
A way to connect peripherals directly to computer memory. It bypasses  
the slower ISA and EISA busses. PCI is a local bus standard.  
Logical Unit  
A subdivision, either logical or physical, of a SCSI device (actually the  
place for the device on the SCSI bus). Most devices have only one  
logical unit, but up to eight are allowed for each of the eight possible  
devices on a SCSI bus.  
LUN  
Logical Unit Number. An identifier, zero to seven, for a logical unit.  
Megabyte. A measure of computer storage equal to 1024 kilobytes.  
Mbyte  
Mainboard  
A large circuit board that holds RAM, ROM, the microprocessor, custom  
integrated circuits, and other components that make a computer work. It  
also has expansion slots for host adapters and other expansion boards.  
Main Memory  
The part of a computer’s memory which is directly accessible by the CPU  
(usually synonymous with RAM).  
Glossary of Terms and Abbreviations  
B-3  
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Motherboard  
Multi-tasking  
Multi-threading  
NVRAM  
See Mainboard. In some countries, the term Motherboard is not  
appropriate.  
The executing of more than one command at the same time. This allows  
programs to operate in parallel.  
The simultaneous accessing of data by more than one SCSI device. This  
increases the data throughput.  
Non Volatile Random Access Memory. Actually an EEPROM  
(Electronically-Erasable Programmable Read Only Memory chip) used to  
store configuration information. See EEPROM.  
Operating  
System  
A program that organizes the internal activities of the computer and its  
peripheral devices. An operating system performs basic tasks such as  
moving data to and from devices, and managing information in memory.  
It also provides the user interface.  
Parity Checking A way to verify the accuracy of data transmitted over the SCSI bus. One  
bit in the transfer is used to make the sum of all the 1 bits either odd or  
even (for odd or even parity). If the sum is not correct, an error message  
appears.  
PCI  
Peripheral Component Interconnect. A local bus specification that allows  
connection of peripherals directly to computer memory. It bypasses the  
slower ISA and EISA busses.  
Peripheral  
Devices  
A piece of hardware (such as a video monitor, disk drive, printer, or  
CD-ROM) used with a computer and under the computer’s control. SCSI  
peripherals are controlled through a SCSI host adapter.  
Pin-1  
Orientation  
The alignment of pin-1 on a SCSI cable connector and the pin-1 position  
on the SCSI connector into which it is inserted. External SCSI cables are  
always keyed to insure proper alignment, but internal SCSI ribbon cables  
are sometimes not.  
PIO  
Programmed Input/Output. A way the CPU can transfer data to and from  
memory via the computer’s I/O ports. PIO is usually faster than DMA, but  
requires CPU time.  
Port Address  
Port Number  
Also Port Number. The address through which commands are sent to a  
host adapter board. This address is assigned by the PCI bus.  
See Port Address.  
B-4  
Glossary of Terms and Abbreviations  
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Queue Tags  
RAM  
A way to keep track of multiple commands that allows for increased  
throughput on the SCSI bus.  
Random Access Memory. The computer’s primary working memory in  
which program instructions and data are stored and are accessible to the  
CPU. Information can be written to and read from RAM. The contents of  
RAM are lost when the computer is turned off.  
RISC Core  
ROM  
LSI Logic SCSI chips contain a RISC (Reduced Instruction Set  
Computer) processor, programmed through microcode scripts.  
Read Only Memory. Memory from which information can be read but not  
changed.The contents of ROM are not erased when the computer is  
turned off.  
SCAM  
SCSI Configured AutoMatically. A method to automatically allocate SCSI  
IDs via software when SCAM compliant SCSI devices are attached.  
Scatter/Gather  
A device driver feature that lets the host adapter modify a transfer data  
pointer so that a single host adapter transfer can access many segments  
of memory. This minimizes interrupts and transfer overhead.  
SCSI  
Small Computer System Interface. A specification for a high performance  
peripheral bus and command set. The original standard is referred to as  
SCSI-1.  
SCSI-2  
SCSI-3  
The current SCSI specification which adds features the original SCSI-1  
standard.  
The next SCSI specification, which adds features to the SCSI-2 standard.  
Although this version is still in development, parts of the SCSI-3 standard  
are already in use.  
SCSI Bus  
A host adapter and one or more SCSI peripherals connected by cables  
in a linear chain configuration. The host adapter may exist anywhere on  
the chain, allowing connection of both internal and external SCSI  
devices. A system may have more than one SCSI bus by using multiple  
host adapters.  
SCSI Device  
Any device that conforms to the SCSI standard and is attached to the  
SCSI bus by a SCSI cable. This includes SCSI host adapters and SCSI  
peripherals.  
Glossary of Terms and Abbreviations  
B-5  
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SCSI ID  
A way to uniquely identify each SCSI device on the SCSI bus. Each  
SCSI bus has eight available SCSI IDs numbered 0 through 7 (or 0  
through 15 for Wide SCSI). The host adapter usually gets ID 7 giving it  
priority to control the bus.  
SDMS  
STA  
SCSI Device Management System. A LSI Logic software product that  
manages SCSI system I/O.  
SCSI Trade Association. A group of companies that cooperate to  
promote SCSI parallel interface technology as a viable mainstream I/O  
interconnect for commercial computing.  
Single-Ended  
SCSI  
A hardware specification for connecting SCSI devices. It references each  
SCSI signal to a common ground. This is the most common method (as  
opposed to differential SCSI which uses a separate ground for each  
signal).  
Synchronous  
Data Transfer  
One of the ways data is transferred over the SCSI bus. Transfers are  
clocked with fixed-frequency pulses. This is faster than asynchronous  
data transfer. Synchronous data transfers are negotiated between the  
SCSI host adapter and each SCSI device.  
System BIOS  
Termination  
Ultra SCSI  
Controls the low level POST (Power On Self Test), and basic operation  
of the CPU and computer system.  
The electrical connection required at each end of the SCSI bus,  
composed of a set of resisters. It improves the integrity of bus signals.  
A standard for SCSI data transfers. It allows a transfer rate of up to  
20 Mbytes/s over an 8-bit SCSI bus and up to 40 Mbytes/s over a 16-bit  
SCSI bus. STA (SCSI Trade Association) supports using the term “Ultra  
SCSI” over the term “Fast-20”.  
VCCI  
Voluntary Control Council for Interference.  
Virtual Memory  
VHDCI  
Space on a hard disk that can be used as if it were RAM.  
Very High Density Cable Interconnect. A trapezoidal shielded connector  
that has a 0.8 mm pitch.  
Wide SCSI  
Word  
A SCSI-2 feature allowing 16 or 32-bit transfers on the SCSI bus. This  
dramatically increases the transfer rate over the standard 8-bit SCSI bus.  
A two byte (or 16-bit) unit of information.  
B-6  
Glossary of Terms and Abbreviations  
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Index  
SCSI host adapters 3-2  
channel switches  
incurring improper termination 2-8  
settings 2-23  
check list  
verifying installation procedure 2-28  
choosing the mono/color setting 3-5  
completing the SYM22801 installation 2-28  
configuring the host adapter 3-13-13  
connecting the SCSI peripherals 2-6  
connectors  
A
active termination  
single-ended SCSI 1-3, A-6  
adapter configuration menu  
example 3-5  
adapter setup menu  
CHS mapping 3-9  
example 3-7  
host SCSI ID 3-8  
parity 3-7  
removable media support 3-8  
SCAM support 3-7  
scan order 3-8  
high density 1-3, A-1, A-6  
LED interface A-9  
low density 1-3, A-1, A-6  
spinup delay 3-9  
additional adapter  
configuring 3-5  
alternate CHS mapping 3-9  
auto-termination  
D
description 1-3  
detailed installation procedure 2-32-6  
device default settings table 3-2  
device selections menu  
disconnect 3-12  
enabled/disabled 2-192-22  
scheme 2-8  
exiting 3-13  
format device 3-12  
initial boot 3-12  
B
BIOS support  
for the SYM22801 board 1-1  
board characteristics  
SYM22801 dimensions A-1  
SYM22801 host adapter 1-2  
boot order menu  
queue tags 3-12  
read write I/O time-out 3-12  
restore default setup 3-13  
scan for device at boot time 3-12  
scan for SCSI logical units 3-12  
sync rate 3-11  
changing an adapter’s boot order 3-5  
example 3-4  
verify 3-13  
removing an adapter’s boot order 3-5  
setting the boot order 3-4  
width 3-11  
device termination  
external SCSI device connections 2-20  
internal & external SCSI device connections 2-21  
internal SCSI device connections 2-19  
to both internal connectors 2-22  
disconnect option 3-12  
display mode  
C
cable detection simulation 2-24  
chained connection 2-11, 2-17  
change status on next boot menu  
example 3-4  
main menu option 3-5  
DMA bus master 1-2  
changing the default configuration  
IX-1  
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duplication of SCSI IDs 2-26  
J
jumper  
E
setting interrupts 2-27  
setting peripheral device SCSI IDs 2-26  
electrical characteristics A-2  
electromagnetic compliance A-3  
Esc  
L
main menu option 3-6  
language option  
main menu 3-6  
LED cable 2-14  
Ext68 channel switch (switch 4) 2-24  
external SCSI bus connections  
making 2-152-17  
LED connectors J5/J9 A-9  
LED Interface A-9  
low density connectors  
50 pin 1-3, A-1, A-6  
low voltage  
F
FDISK /MBR command  
removing partition 3-9  
features  
GPIO0_FETCH line A-9  
SYM22801 board 1-2  
Flash BIOS 1-1  
format device option  
low-level formatting 3-12  
removing partitions/data 3-9  
front panel LED 2-14  
M
main menu  
adapter boot order option 3-4  
additional adapter configuration option 3-5  
change adapter status option 3-4  
display mode option 3-5  
Esc option 3-6  
G
global default settings table 3-1  
GPIO0_FETCH line  
help option 3-6  
language option 3-6  
mono/color option 3-5  
quit option 3-6  
maximum/minimum output A-9  
H
N
help option  
device selections menu 3-13  
main menu 3-6  
NVRAM (Non Volatile Random Access memory) 3-2  
high density connectors  
68 pin 1-3, A-1, A-6  
Host SCSI ID 3-8  
O
Operational Environment A-3  
P
I
parity  
disabling 3-7  
PCI bus  
initial boot option 3-12  
inserting the host adapter 2-42-6  
installation procedure  
high-speed standard local bus 1-3  
re-routing to INTA/ 2-27  
routing INTB/ 2-27  
check list 2-28  
detailed setup instructions 2-3  
Int50 channel switch (switch 1) 2-24  
Int68 channel switch (switch 2) 2-24  
internal SCSI bus connections  
making 2-82-15  
PCI Interface 1-2, 1-3, A-3  
PCI Local Bus Specification 1-3, A-3  
peripheral device SCSI IDs  
setting with jumpers 2-26  
peripheral device terminators 2-19  
physical environment A-3  
power management device 3-9  
power requirements  
interrupts  
setting 2-27  
IX-2  
Index  
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SYM22801 board A-2  
channel switches 1-4, 2-23  
configuring 3-13  
Q
description 1-3  
dimensions A-1  
electrical characteristics A-2  
electromagnetic compliance A-3  
features 1-2  
queue tags option 3-12  
quick installation procedure 2-3  
quit option  
main menu 3-6  
installing 2-28  
LED interface A-9  
NVRAM 3-2  
R
PCI interface 1-3  
ribbon cable 2-6  
safety characteristics A-3  
SCSI bus termination 2-18  
SCSI interface 1-3  
S
safety characteristics A-3  
SCAM support 3-7  
scan for device at boot time 3-12  
scan for SCSI logical units 3-12  
scan order 3-8  
SCSI BIOS configuration utility  
changing adapter status 3-4  
configuring an adapter 3-5  
exiting 3-13  
SDMS software 1-1, A-3  
setting interrupts 2-27  
shielded cable connectors 2-7  
supporting Ultra SCSI protocols 1-4  
thermal, atmospheric characteristics A-3  
UL flammability rating A-3  
SYM53C876 PCI-Ultra SCSI I/O Processor chip 1-3, A-  
4
sync rate 3-11  
mono/color option 3-5  
pressing "Ctrl-A" to re-enable controllers 3-3  
pressing "Ctrl-C" to invoke 3-2  
quit option 3-6  
selecting an adapter 3-3  
starting 3-2  
T
technical specifications A-9  
termination  
erroneous 2-19  
external SCSI device connections 2-20  
improper assignment of switches 2-8  
internal & external SCSI device connections 2-21  
internal SCSI device connections 2-19  
override switches U1 or U2 2-23  
SCSI bus 2-182-23  
SCSI bus connections 2-6  
SCSI bus termination  
SYM22801 board 2-182-23  
SCSI cables  
internal/external connectors 2-7  
SCSI IDs 2-25  
to both internal connectors 2-22  
TERMPWR  
SCSI Interface 1-2, 1-3, A-6  
SCSI Peripherals 2-6  
setting interrupts 2-27  
Setting SCSI IDs 2-25  
signal assignments  
power requirements A-2  
short condition A-2  
termination power 1-4  
terse setting 3-5  
PCI interface A-3  
thermal, atmospheric characteristics A-3  
TP9 jumper 2-27  
SCSI interface A-6, A-8  
software  
SCSI Device Management System (SDMS) 1-1, A-3  
spinup delay 3-9  
U
switches  
U1 or U2 switches  
overriding termination 2-23  
UL flammability rating  
SYM22801 board A-3  
Ultra SCSI  
allowing faster synchronous data transfers 1-4  
cable connections 2-7  
upper term channel switch (switch 3) 2-24  
providing cable detection simulation 2-24  
SYM22801 host adapter  
40 MHz oscillator 1-4  
accessing peripheral devices 2-4  
active termination 1-3, A-6  
BIOS support 1-1  
board characteristics 1-2  
Index  
IX-3  
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utilities menu  
adapter setup option 3-73-9  
device selections option 3-103-13  
example 3-6  
exiting 3-6  
V
verbose setting 3-5  
verify option 3-13  
VHDCI connectors  
68 pin 1-3, 2-15, A-1  
IX-4  
Index  
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Canada  
Ontario  
Fax: 91.80.338.6591  
Fax: 886.2.2718.8869  
STeclh: a8u4m7.b9u9r5g.1600  
OTetlt:a6w1a3.592.1263  
Israel  
Ramat Hasharon  
Fax: 847.995.1622  
Fax: 613.592.3253  
Avnet-Mercuries  
Corporation, Ltd  
Tel: 886.2.2503.1111  
Fax: 886.2.2503.1449  
LTeSl:I 9L7o2g.i3c.5.480480  
Kentucky  
Bowling Green  
Tel: 502.793.0010  
Fax: 502.793.0040  
TToerl:o4n1to6.620.7400  
Fax: 972.3.5.403747  
Fax: 416.620.5005  
Jeilin Technology  
Corporation, Ltd  
Tel: 886.2.2248.4828  
Fax: 886.2.2242.4397  
Netanya  
Quebec  
VLSI Development Centre  
Tel: 972.9.657190  
Fax: 972.9.657194  
Maryland  
Bethesda  
Tel: 301.897.5800  
Fax: 301.897.8389  
MTeol:n5tr1e4a.l694.2417  
Fax: 514.694.2699  
Lumax International  
Corporation, Ltd  
Tel: 886.2.2788.3656  
Fax: 886.2.2788.3568  
Italy  
Milano  
Massachusetts  
INTERNATIONAL  
LTeSl:I 3L9o.g0i3c9S.6.8P.7A3.71  
WTeal:lt7h8a1m.890.0180  
Australia  
New South Wales  
Fax: 39.039.6057867  
Fax: 781.890.6158  
United Kingdom  
TReel:p6te1c2h.9n9ic53P.9ty84L4td  
Bracknell  
Japan  
Tokyo  
Minnesota  
Fax: 612.9953.9683  
TLeSl:I 4L4o.g1i3c4E4.u4r2o6p5e4L4td  
TMeiln:n6e1a2p.9o2lis1.8300  
Fax: 44.1344.481039  
LTeSl:I 8L1o.g3i.c54K6.3K..7821  
Fax: 612.921.8399  
China  
Beijing  
Fax: 81.3.5463.7820  
New Jersey  
LSI Logic International  
Services Inc  
Tel: 86.10.6804.2534.40  
Fax: 86.10.6804.2521  
Sales Offices with  
OTesl:a8ka1.6.947.5281  
Design Resource Centers  
ETedli:s7o3n2.549.4500  
Fax: 81.6.947.5287  
Fax: 732.549.4802  
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