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2
Installing the Host Adapter
Follow these instructions to install the host adapter:
1
Turn
power to the computer and peripheral
OFF
devices and disconnect the power cords.
2
Remove the cover from the computer case.
3
Locate an unused 32-bit PCI expansion slot (the
slot must support Bus Master data transfers);
unscrew and remove the metal bracket that covers
the card-slot opening. (Save the screw to use when
securing the host adapter in your computer.)
PCI slots are shorter than ISA or EISA slots and
are typically white. One of these may be a shared
slot into which you can insert either an ISA/EISA
board or a PCI board.
4
Insert the host adapter in the PCI expansion slot.
Press it down firmly so that the contacts are
securely seated in the slot.
5
When the host adapter is firmly seated in the
expansion slot, secure the metal bracket of the host
adapter with the screw you removed in step 3.
Do not replace the computer cover or reconnect your
computer and peripherals to their power sources yet!
3
SCSI Configuration Guidelines
Before installing your SCSI devices, you should
understand the basic SCSI concepts described in this
section. The information will help you set up your
host adapter and devices so they function properly.
SCSI ID Numbers
Each device attached to the host adapter, as well as
the host adapter itself, must have a unique SCSI ID
number (0 to 7 for the AHA-2940Ultra, and 0 to 15 for
the AHA-2940Ultra Wide).
We recommend that you leave the host adapter set
to its default setting of SCSI ID 7. If you need to
change the host adapter SCSI ID, see Configuring the
Host Adapter on page 7. To change the SCSI ID on
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