Setting Up Scsi Devices; Check The Scsi Ids - Adaptec AAA-130U2 Installation And Hardware Manual

AAA-130U2 Series Installation and Hardware Guide

Setting Up SCSI Devices

Setting up SCSI devices before attaching them to the AAA-131U2/
133U2 typically involves setting SCSI IDs and termination, mount-
ing internal devices inside your computer or external array enclo-
sure, and connecting power cables to each device. Since setup can
vary from device to device, always refer to the device's documenta-
tion for specific instructions. Below are some guidelines for setting
SCSI IDs and termination on your devices. Additional installation
hints are also provided to help you install your devices.
Note:
If you refer to the device's documentation for installa-
tion instructions, be sure to return to this document to con-
tinue with installation of the software included in the
package.

Check the SCSI IDs

Each device attached to a SCSI channel on the AAA-131U2/133U2,
as well as the SCSI channel itself, must be assigned a unique SCSI ID
number from 0 to 15—no duplicate IDs are permitted on a channel.
ID numbers don't have to be sequential, as long as the channel and
each device has a different number.
We recommend that you leave each RAID card channel set to
its default setting of SCSI ID 7.
SCSI ID 7 has the highest priority on the channel. The priority
of the remaining IDs, in descending order, is 6 to 0, then 15 to 8.
If you have 8-bit SCSI devices, they must use SCSI IDs 0, 1, 2, 3,
4, 5, or 6. (To change the SCSI ID on your hard disk and other
SCSI devices, refer to the device's documentation.)
If you wish to use a single SCSI disk drive (instead of an array)
as your boot device, we recommend that you set the SCSI ID
for the device to zero. Most SCSI hard disks come from the fac-
tory preset to ID 0.
The IDs for internal devices are usually set with jumpers;
external devices are usually set with a switch on the back of the
device.
2-6