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If you are installing external SCSI devices only, replace
the computer chassis cover and skip to Installing External
SCSI Devices on page 4.
Installing Internal SCSI Devices
Step 1:
Install or enable terminators on the internal
SCSI device that you plan to connect to the end of the
internal cable. Then remove or disable terminators on all
other internal devices.
On most internal SCSI devices, you control termination
by setting a jumper or a switch, or by physically remov-
ing or installing a resistor module(s). Refer to the
device's documentation to determine how to enable or
disable termination on your particular device.
Termination
Enabled
Termination
Disabled
Step 2:
Install and mount each internal SCSI device
inside your computer. (Refer to your computer and
device documentation for instructions.)
If you purchased your AHA-2920C as part of an Adaptec
kit, the kit includes one 50-pin internal SCSI cable that
allows you to connect up to two internal SCSI devices.
Step 3:
Plug one end of your 50-pin internal SCSI cable
into the host adapter's internal SCSI connector. To
connect more than two internal devices, you will need to
obtain or purchase a SCSI cable with enough connectors
to accommodate all of your devices.
Make sure that the colored stripe on one side of the cable
is aligned with pin-1 of the host adapter's connector.
Pin-1 of the connector is usually designated by a small
triangle ( ), or a "1" on the connector.
Colored stripe
(typically red or blue)
50-pin SCSI
ribbon cable
Intenal SCSI
connector
Step 4:
Plug the other end of the 50-pin internal SCSI
cable into the connector on the last internal SCSI device
in the chain. (This device must be terminated.) Make sure
the colored stripe on the side of the cable is aligned with
pin-1 of the SCSI device's connector.
Pin 1
Internal SCSI
device
Step 5:
Plug the remaining cable connectors into any
remaining internal devices. (These devices must not be
terminated.)
Colored stripe
(typically red or blue)
3
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