Scsi Ids; Scsi Cable Connectors - Compaq Smart Array 221 User Manual

4-6 Hardware Installation and Cabling Information

SCSI IDs

The Smart Array 221 Controller contains one SCSI bus (port), which supports
up to 15 drives. The internal and external connectors reside on the same SCSI
bus. Peripherals attached to the SCSI bus must have a unique SCSI ID in the
range of 0 to 6 and 8 to 15. SCSI IDs on all peripherals are set manually with
switches or jumpers on the device itself, or set automatically on Compaq
products that support hot-pluggable drives. The SCSI ID determines the
device's priority when attempting to use the SCSI bus. The highest priority,
SCSI ID 7, is reserved for use by the controller.

SCSI Cable Connectors

To help identify the SCSI cables required for Smart Array 221 Controller
installation in the various configurations of Compaq servers, refer to the
illustration below. Keep in mind these characteristics of SCSI cables:
External SCSI cables have a round wire with securable connectors.
Internal SCSI cables have a flat ribbon wire with push-on connectors.
Compaq SCSI cables are keyed so they cannot be installed incorrectly.
External 68-Pin Wide SCSI Connector
Figure 4-1. Identifying SCSI Cable Connectors
Writer: Karen Hale Project: Compaq Smart Array 221 Controller User Guide Comments: 388541-001
File Name: E-CH04.DOC Last Saved On: 11/5/98 12:27 PM
COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED
Internal 68-Pin Wide SCSI Connector