Troubleshooting guide

7-6 DS20E Reference Guide
Compaq Confidential – Need to Know Required
Writer: Robert Young Project: Compaq AlphaServer DS20E System Comments:
Part Number: ER-K8F6W-UA .A01 File Name: h-ch7 Using the Storage Subsystem.doc Last Saved On: 10/4/99 11:13 AM
Disk Drive Configuration
The system is designed for plug and play which offers a jumperless
configuration of SCSI ID, automatic SCSI termination, and automatic system
recognition. The following identifies the backplane drive connectors with
their relationship to the SCSI ID orientation.
Backplane Drive Connectors
The 4-slot and 6-slot backplane provide SCA-2 connector type for direct
connection of the disk carrier.
Table 7-3 and Table 7-4 how the slot numbering for the 4-slot and 6-slot
backplanes. The SCSI ID for disk drives is preset on the backplane with the
lowest ID to the left for a vertically installed storage cage and from the bottom
of a horizontally installed cage. Table 7-5 shows the orientation of the SCSI
IDs for a vertically installed storage cage for the storage subsystems.