Specifications

9-18 • Quick Reference AlphaServer 1000A Owner's Guide
Dual-Controller Configuration Jumper Options
Table 9-9 shows the SCSI IDs and jumpers installed (W1, W2, W3) for a system
with a dual-controller configuration. A jumper cable is used on the backplane to
enable all seven StorageWorks slots on a single bus.
Table 9-9 Dual-Controller Configuration Jumper Options
Device
or Slot
None W1 W2 W3 W1/W2 W1/W3 W2/W3 W1/W2/W3
Bus A
CDROM 4 4 4 4 4 4 4 4
Tape 5 5 5 5 5 5 5 5
Slot 0 0 0 0 8 0 8 8 8
Slot 1 1 1 1 9 1 9 9 9
Slot 2 2 2 2 10 2 10 10 10
Slot 3 3 3 3 11 3 11 11 11
Bus B
Slot 4 0 4 8 0 12 4 8 12
Slot 5 1 5 9 1 13 5 9 13
Slot 6 2 6 10 2 14 6 10 14