Changing Drive Id Numbers; When To Change Drive Id Numbers; Changing A Drive Id: Rules - DEC 4000 600 series Owner's Manual

Changing Drive ID Numbers

Changing Drive ID Numbers
When to Each drive ID number is determined at the factory. Extra drive
Change Drive ID plugs are supplied with your system. You may need to use
ID Numbers
the extra plugs to renumber your drives under the following
circumstances:
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Use the following rules to decide how to renumber your storage
Changing a
devices:
Drive ID: Rules
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6–22 System Configuration
If you connect additional devices to your system
If you cluster two systems
If you cluster two or more DSSI systems, you may
need to set DSSI parameters instead of changing drive
ID numbers. For information about setting DSSI
parameters, refer to Setting and Examining Parameters
for DSSI Devices.
For each bus, do not duplicate drive ID numbers for storage
devices/adapters. For Bus A, you can have only one storage
device identified as drive 0, one storage device as drive 1,
and so on; for Bus B, you can have only one storage device
identified as drive 0, one storage device as drive 1, and so on.
By convention, the fixed-disk drives are numbered in
increasing order from right to left, beginning with zero.
Adapters use the highest available drive ID numbers.
Note