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Compaq HSZ80 Array Controller ACS Version 8.3 Configuration and CLI Reference Guide
Setting the PVA Module ID Switch
The Power, Verification, and Addressing (PVA) module provides unique addresses to
extended subsystems. Each BA370 rack-mountable enclosure in an extended
subsystem must have its own PVA ID. Use PVA ID 0 for the enclosure that contains
the controllers. Use PVA IDs 2 and 3 for the additional enclosures. Figure 2–4
illustrates the PVA settings in an extended subsystem.
See the documentation that accompanied your enclosure for more details about the
PVA and its settings.
Figure 2–4. SCSI Target ID Numbers on the Controller Device Bus and PVA Settings in an
Extended Subsystem
CXO5806B
Controller A
Controller B
EMU
PVA 0
Cache B Cache A
SCSI Target ID = 3
SCSI Target ID = 2
SCSI Target ID = 1
SCSI Target ID = 0
First Expansion
Enclosure
Master
Enclosure
Second Expansion
Enclosure
EMU
PVA 3
SCSI Target ID = 15
SCSI Target ID = 14
SCSI Target ID = 13
SCSI Target ID = 12
NOTE: SCSI target IDs 4 and 5 are reserved. IDs 6 and 7 are used by the controllers.
EMU
PVA 2
SCSI Target ID = 11
SCSI Target ID = 10
SCSI Target ID = 9
SCSI Target ID = 8