Scsi Controllers; Scsi Id Assignments - Compaq ProLiant Storage System U1 User Manual

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1-9 Introduction to the ProLiant Storage System /U

SCSI Controllers

ProLiant Storage System /U may be connected to any Fast-Wide SCSI-2 or
Wide-Ultra SCSI controller with appropriate external wide SCSI cables.
Supported Compaq SCSI controllers include:
32-Bit Fast-Wide SCSI-2 Controller
Wide-Ultra SCSI-3 Controller
SMART-2 Array Controller Family

SCSI ID Assignments

Each device on a SCSI bus must have a unique identification number in the
range of 0 to 6. The SCSI ID determines the device priority when attempting to
use the SCSI bus. The highest priority, SCSI ID 7, is reserved for the
controller.
SCSI IDs are automatically assigned in the storage system according to the
drive bay used for each drive. The SCSI ID for each bay is indicated on the
front panel for both single and dual bus systems.
IMPORTANT: All SCSI hard drives on the same SCSI bus must be either internal
(within the server) or in an external storage system, but not both. A configuration
with both internal and external SCSI hard drives requires more than one SCSI bus.
CAUTION: Server lockups could occur if a hard drive is installed in a drive
bay set with a SCSI ID that is already used by another device in the server if
both devices are on the same SCSI bus.
Compaq ProLiant Storage System /U User Guide