Adaptec AHA-2940U2 User manual
1
INTRODUCTION
With SCSI Card 2940U2W, you can connect up to 15 SCSI peripherals,
such as hard disk drives, scanners, CD-ROM drives, tape drives, to any
IBM-compatible computer with PCI expansion slots.
This installation guide provides instructions for:
• Installing the SCSI Card 2940U2W
• Connecting SCSI peripherals
• Installing SCSI Card 2940U2W software
See the SCSI Card 2940U2W User’s Reference for additional informa-
tion on using the SCSI Card 2940U2W.
Check the Kit Contents
Your SCSI Card 2940U2W kit should contain the following items:
SCSI Card 2940U2W
High-density 68-pin Internal Ultra SCSI Cable
Standard 50-pin Internal Ultra SCSI Cable
High-density 68-pin Internal Ultra2 SCSI Cable
Standard 50-pin Internal-to-High-density
50-pin External Ultra SCSI Cable (With
Two Internal Connectors)
Manuals
Disks and
CD-ROM
2
Bus Segments on the SCSI Card 2940U2W
The SCSI Card 2940U2W features Adaptec SpeedFlex™ technology.
SpeedFlex technology ensures that you get the most performance from
your Ultra2 SCSI peripherals by electronically isolating the Ultra2 SCSI
segment from the Ultra SCSI segment on the SCSI bus. With the
SpeedFlex advantage, the SCSI Card 2940U2W can support Ultra2
SCSI peripherals at speeds up to 80 MBytes/sec while simultaneously
supporting Wide Ultra/Ultra (legacy) peripherals at speeds up to 40
MBytes/sec.
Attaching Wide Ultra/Ultra SCSI peripherals to the Ultra2
SCSI segment of the SCSI bus causes the Ultra2 SCSI segment and
any attached peripherals to drop to Ultra SCSI performance levels
(40 MBytes/sec). Attaching only Ultra2 peripherals to the Ultra2
segment, ensures that all peripherals on the Ultra2 segment will
perform at Ultra2 performance levels (80 MBytes/sec).
Attaching an Ultra2 peripheral to the Ultra SCSI segment causes the
Ultra2 peripheral to drop to Ultra SCSI performance levels instead
of Ultra2 SCSI performance levels at which it is designed to run.
NOTE
Ultra2 SCSI
Segment
68-pin External
Ultra2 Connector
68-pin Internal
Ultra2 Connector 68-pin Internal
Wide Ultra Connector
50-pin Internal
Ultra Connector
Ultra SCSI
Segment
AIC-3860
AIC-7890
3
Discharge any static electricity build-up before handling your SCSI
card by touching a grounded metal object (like the exposed metal
parts on the back of your computer).
After you turn off your computer and unplug the power cord, remove
the cover from the computer.
Refer to your computer manual for instructions on removing the cover.
Locate an unused PCI expansion
slot and remove the expansion slot
cover. (The expansion slot must be
PCI Rev. 2.1 or higher compliant
and support Bus Mastering.) Save
the slot cover screw for use in
Step 4.
Computers may have
vertical or horizontal
expansion slots. Refer
to your computer
manual to locate the
PCI slots. If your
computer is a tower
model, lay it on its
side to allow for easier
installation of the
SCSI Card 2940U2W.
INSTALLING THE SCSI CARD 2940U2W
Turn OFF power to the computer and disconnect the
power cord.
WARNING
STEP 1
STEP 2
STEP 3
PCI Expansion Slots
(Typically White or Ivory)
Slot Cover Screw
Expansion
Slot Cover
4
Insert the SCSI Card 2940U2W into the PCI expansion slot; press
down firmly until it clicks into place, then replace the slot cover screw.
SCSI Card 2940U2W Installed
in a PCI Expansion Slot
If you refer to the peripheral’s documentation for installa-
tion instructions, be sure to return to this document to continue
with installation of the software included in the package.
NOTE
Check the SCSI IDs
The SCSI Card 2940U2W and each peripheral you connect to it
requires a unique SCSI ID number ranging from 0 to 15. ID numbers
don’t have to be sequential, as long as the SCSI Card 2940U2W and
each peripheral has a different number.
The SCSI Card 2940U2W is preset to ID 7 and should not be changed.
If you will be booting from a SCSI hard disk, it’s best to set the disk’s ID
at 0 or 1. Most SCSI hard disks come from the factory preset to ID 0.
The IDs for internal peripherals are usually set with jumpers; external
peripherals are usually set with a switch on the back of the peripheral.
Terminate the Ends
To ensure reliable communication on the SCSI bus, the peripheral at
the end of each cable, or the end of the cable itself, must have a termi-
nator installed (or enabled). The peripherals between the ends of each
cable must have the terminator removed (or disabled).
Setting up SCSI peripherals before attaching them to the SCSI Card
2940U2W typically involves setting SCSI IDs and termination, mount-
ing internal peripherals inside your computer, and connecting power
cables to each peripheral. Since setup can vary from peripheral to
peripheral, always refer to the peripheral’s documentation for specific
instructions. Below are some guidelines for setting SCSI IDs and ter-
mination on your peripherals.
SETTING UPSCSI PERIPHERALS
STEP 4
5
A total of 15 SCSI peripherals can be connected to the SCSI Card
2940U2W. Before connecting peripherals to the SCSI Card 2940U2W,
be sure to also review Setting Up SCSI Peripherals on page 3.
68-pin Internal Ultra2 SCSI Connector
Use the 68-pin internal Ultra2 SCSI connector to connect internal
Ultra2 peripherals. The connector is an Ultra2 Low Voltage
Differential, Single Ended (Ultra2-LVD/SE) connector. The internal
Ultra2 cable included in the kit allows up to four internal Ultra2
peripherals. If you have more than four Ultra2 peripherals, you will
need to obtain an Ultra2 cable with enough connectors to accommo-
date all of your Ultra2 peripherals. Follow these steps to connect your
internal Ultra2 peripherals:
We recommend keeping your Ultra2 peripherals separate
from your non-Ultra2 peripherals. Connecting a non-Ultra2
peripheral to the Ultra2 SCSI connector forces the Ultra2 SCSI seg-
ment and any attached peripherals to drop down to Ultra SCSI per-
formance levels (40 MBytes/sec). (See “Bus Segments on the SCSI
Card 2940U2W” on page 2.)
NOTE
Locate the 68-pin internal Ultra2 SCSI cable in the package.
CONNECTING SCSI PERIPHERALS
STEP 1
STEP 2
Built-in Terminator
Connect to Ultra2 Peripherals
Connect to
SCSI Card 2940U2W
Connectors Labeled
“Ultra2-LVD/SE”
68-pin Internal Ultra2
SCSI Connector
68-pin Internal Ultra2 SCSI Cable
Plug the long end of the cable to the Ultra2 connector on the SCSI
Card 2940U2W (connectors are labeled “Ultra2-LVD/SE”).
6
Plug the remaining connectors to your internal Ultra2 SCSI peripherals.
STEP 3
STEP 1
Connect to SCSI Card 2940U2W
Connect to Fast/Wide Ultra
Peripheral (Terminated)
Connect to Fast/Wide Ultra
Peripheral (Not Terminated)
Built-in Terminator on Cable
Ultra2 SCSI Peripherals (Ultra2-LVD/SE)
68-pin Internal Wide Ultra SCSI Connector
Use the 68-pin internal Wide Ultra SCSI connector to connect internal
Fast/Wide Ultra SCSI peripherals that have 68-pin connectors. Do not
connect Ultra2 peripherals to this connector.
The 68-pin internal Ultra SCSI cable included in the kit allows you to
to connect up to two Fast/Wide Ultra peripherals. If you have more
than two Fast/Wide Ultra peripherals, you will need to obtain a 68-pin
cable with enough connectors to accommodate all of your Fast/Wide
Ultra peripherals. Follow these steps to connect your internal
Fast/Wide Ultra peripherals.
Locate the 68-pin internal Ultra SCSI cable in the package.
Internal Ultra2 SCSI peripherals come from the factory
with termination disabled and cannot be changed. Proper termina-
tion is provided by the built-in terminator at the end of the Ultra2
internal SCSI cable provided in the kit.
NOTE
7
50-pin Internal Ultra SCSI Connector
Use the 50-pin internal Ultra SCSI connector to connect internal or
external Fast/Ultra Narrow SCSI peripherals that have standard 50-pin
connectors.
Internal Fast/Ultra Narrow SCSI Peripherals
The 50-pin internal cable included in the kit allows you to connect up
to two standard internal SCSI peripherals. If you have more than two
standard internal 50-pin peripherals, you will need to obtain a 50-pin
cable with enough connectors to accommodate all of your standard
peripherals. Follow these steps to connect your standard internal
Fast/Ultra Narrow peripherals:
Locate the 50-pin internal Ultra SCSI cable in the package.
(Continued on the other side)
STEP 2
STEP 3
STEP 4
STEP 1
Plug the other end of the cable to a terminated Fast/Wide Ultra SCSI
peripheral.
To connect a second Fast/Wide Ultra
SCSI peripheral, plug the middle
connector of the cable to the
peripheral. The peripheral must
not be terminated.
Connect to SCSI Card 2940U2W
Connect to Fast/Ultra Narrow
Peripheral (Not terminated)
Connect to Fast/Ultra Narrow
Peripheral (Terminated)
68-pin Internal Wide Ultra SCSI Connector
Terminated SCSI Peripheral Unterminated SCSI Peripheral
Plug the long end of the cable to the 68-pin internal Ultra SCSI
connector on the SCSI Card 2940U2W.
68-pin Internal Wide Ultra SCSI Cable
8
Plug the other end of the cable to a terminated Fast/Ultra
Narrow SCSI peripheral.
To connect a second Fast/Ultra Narrow
SCSI peripheral, plug the middle
connector of the cable to the
peripheral. The peripheral must
not be terminated.
STEP 1
STEP 3
STEP 4
External Fast/Ultra Narrow SCSI Peripherals
The 50-pin internal-to-high-density 50-pin external Ultra SCSI cable,
also included in the kit, allows you to connect your standard external
SCSI peripherals and up to two standard internal SCSI peripherals. For
each external peripheral, you will need to obtain a 50-pin external SCSI
cable. Follow these steps to connect your standard external peripherals:
Secure to Card Slot Opening in
Computer Chassis Connect to Fast/Ultra Narrow Internal
Peripherals (Not terminated)
Connect to SCSI Card 2940U2W
STEP 2Plug the long end of the cable to the 50-pin connector on the SCSI
Card 2940U2W.
50-pin Internal Ultra SCSI Connector
50-pin Internal Ultra SCSI Cable
Terminated SCSI Peripheral Unterminated SCSI Peripheral
Locate the 50-pin internal-to-high-density 50-pin external Ultra SCSI
cable in the package.
This cable enables you to keep external Ultra SCSI periph-
erals without impeding the performance of your Ultra2 SCSI
peripherals. (See “Bus Segments on the SCSI Card 2940U2W” on
page 2.)
NOTE
9
Secure the mounting bracket of the cable to the exposed card slot
opening in the chassis of the computer.
STEP 2
STEP 3
STEP 4
Remove an available slot cover from the chassis of the computer.
Plug one end of the cable to the 50-pin internal Ultra SCSI connector
on the SCSI Card 2940U2W.
50-pin Internal Ultra SCSI Connector
Standard 50-pin Internal-to-High-density
50-pin External Ultra SCSI Cable
Use these connectors on the cable to
connect up to two internal Fast/Ultra
Narrow SCSI peripherals, These
peripherals must not be terminated.
Remove Slot Cover (Preferably
Next to the SCSI Card 2940U2W)
10
STEP 5
STEP 6
STEP 7
STEP 8
Connect one end of the external
SCSI cable to the 50-pin external
connector on the internal-to-
external cable.
Connect the other end of the exter-
nal SCSI cable to a SCSI connector
on the back of the external SCSI
peripheral. If you are installing
only one external peripheral, ter-
minate the peripheral and
skip to Step 8.
Connect other external peripherals by connecting each peripheral to
the previous one until all peripherals are connected. The peripheral at
the end of the chain must be the only exter-
nal peripheral terminated.
Connect all power cables to the external peripherals.
High-density 50-pin
External SCSI Cable
(Not Included in Kit)
44
44
SCSI Terminator
(Not Included in Kit)
Terminated SCSI
Peripheral
High-density 50-pin External Connector
68-pin External Ultra2 SCSI Connector
This manual suits for next models
1
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