Alpha 1000A Specifications Page 138

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6-30 Configuring AlphaServer 1000A Owner's Guide
Table 6-4 SCSI IDs for Configuration
SCSI Device SCSI ID
CDROM drive 4*
Tape drive 5*
Slot 0 0
Slot 1 1
Slot 2 2
Slot 3 3
Slot 4 4*
Slot 5 5*
Slot 6 6
Note:
The system does not recognize two drives with the same
ID number. Seven drives is the maximum number this
configuration can recognize. If you use StorageWorks slots 4
and 5, you must disable the CDROM drive and the tape drive.
If you use the CDROM drive and tape drive, you must remove
drives from StorageWorks slots 4 and 5.
Dual-Controller Configuration
In the dual-controller configuration shown in Figure 6-8, all seven StorageWorks
slots are run from a controller on a PCI or EISA adapter card, and are included on
bus B. A jumper cable connects the 68-pin J11 and J16 connectors on the
backplane. Note that the lowest set of pins (W1) on the J3 jumper are attached
(enabled). The CDROM drive and tape drive, if installed, reside on a dedicated bus
(bus A). Table 6-5 shows the SCSI ID settings for this configuration.The features of
this configuration are listed below:
Caution:
Avoid bending the SCSI cable when
folding it.
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