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5
Connect a DC power cable (from your computer’s
power supply) to the power connector on the SCSI
device.
Connecting External SCSI Devices
If you are connecting external SCSI devices to your host
adapter, you must obtain an external SCSI cable for each
external device you install.
1
Prepare each SCSI device for installation; configure
the SCSI ID and attach a terminating plug into the
last external device. For instructions, see the device’s
documentation as well as Installing the Host Adapter
and SCSI Devices on page 2.
2
Plug the connector at one end of the external SCSI
cable into the host adapter’s external SCSI connector.
3
Plug the connector at the other end of the cable into
one of the SCSI connectors on the external SCSI
device.
4
To connect other external SCSI devices, daisy-chain
each device to the previous device until all external
SCSI devices have been connected.
Using the LED Connector
(Optional) Most computers have an LED disk activity
light on the front panel. If you disconnect the cable from
the LED connector on the motherboard and connect it to
the LED connector on the host adapter, the LED on the
front panel of the computer will light whenever there is
activity on the SCSI bus.
Reassembling the Computer
Be sure all power switches are
OFF
, then replace the com-
puter chassis cover and reconnect the power cables to
your computer and SCSI devices.
Configuring the
Computer
PCI Configuration
If your computer does not recognize the host adapter
after you install it (e.g, you receive an error message, or
you cannot access any of the attached SCSI devices), run
the computer’s setup program and check the PCI config-
uration parameters. Usually you start the setup program
by pressing a specified key combination when your com-
puter boots (refer to your computer’s documentation.)
Here are some things you may need to do in the setup
program.
Note:
Some configuration options apply to a
specific PCI bus slot; therefore, if you change
these options be sure you are applying them to
the slot in which the host adapter is installed.
Read your computer documentation if you are
not sure which slot corresponds to each number.
■
If there is an Interrupt Type or Interrupt Line option
in the setup program, be sure to select Int-A or
Interrupt Type = A
. Depending on your system
design, you may also need to change a motherboard
jumper setting.
■
If there is a Triggering Interrupt option, be sure to
select Level.
■
If there is an option to enable or disable bus master-
ing for the PCI slots, be sure to select Enabled.
■
If there is an option to enable or disable individual
PCI slots, be sure the slot in which you install the host
adapter is enabled.
■
If your computer has a combination of ISA (or EISA)
boards and PCI boards, you may need to mark the
IRQs used by ISA/EISA boards as Used so the system
BIOS will not try to assign these IRQs to other PCI
boards.
■
In some systems the BIOS reserves a set of available
IRQs for PCI boards, and you have to assign these
IRQs manually.