Adaptec SBC-599, SBC-596 Installation and Setup, Scsi Configuration Guidelines, Scsi ID Numbers

Installation and Setup

The SBC-599 is equipped with an Adaptec AIC-7880 Ultra Wide PCI-to-Ultra SCSI host adapter which provides a powerful multitasking interface between your computer’s PCI bus and SCSI devices (disk drives, CD-ROM drives, scanners, tape backups, removable media drives, etc.). Up to a total of 15 SCSI devices can be connected to the internal or external SCSI connector on AIC-7880.

If you need to configure the SCSI, the onboard SCSI Select configuration utility allows you to change host adapter settings without opening the computer or handling the board. The SCSI Select utility also contains a utility to low-level format and verifies the disk media on your hard disk drives.

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 (0-15). The SCSI ID serves two purposes:

-It uniquely defines each SCSI device on the SCSI bus.

-It determines the device’s priority on the SCSI bus.

SCSI ID7 has the highest priority. The priority of the remaining IDs, in descending order, is 6 to 0 and 15 to 8.

Note: SCSI IDs play no role in determining the order in which devices are cabled to the host adapter.

64 SBC-596/599 User's Manual