Digital Equipment PRIORIS ZX 5000 MP, User Manual, Page: 98 / 169

Expanding Your Server
3-53
SCSI Drive IDs
SCSI bus device addresses are automatically assigned in the hot-swap
drive bay depending on the slot number in which they are installed. The
address jumper on the storage backplane is used to override the default
addresses. The default settings are listed in the following table and can be
set manually to different addresses at your option. The storage backplane
can be configured as two separate SCSI buses or as a single SCSI bus
using a jumper cable. Note that:
•
The SCSI ID addressing is independent of the single or dual SCSI
bus arrangement. Make sure you select unique SCSI IDs for all
SCSI devices on the SCSI bus.
•
You must use a wide SCSI host adapter to set SCSI IDs greater
than seven.
•
Your CD-ROM drive and tape IDs must be set manually. Refer to
your manufacturer’s documentation for information on setting drive
IDs.
NOTE:
You can add narrow SCSI devices to a wide SCSI
bus, however, because of the ID settings, narrow devices
take up two IDs selections on a wide bus.