Installation guide

Changing Drive ID Numbers

When to

Change Drive

ID Numbers

Each drive ID number is determined at the factory. Extra drive

ID plugs are supplied with your system. You may need to use

the extra plugs to renumber your drives under the following

circumstances:

• If you connect additional devices to your system

• If you cluster two systems

Note

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.

Changing a

Drive ID: Rules

Use the following rules to decide how to renumber your storage

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.

6–22 System Conﬁguration