IBM ServeRAID-4 Ultra160 Series, User Reference

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Note: If you have the battery backup option, it is disabled when you create a
fault-tolerant pair. The write-cache mode is automatically changed from
write-back mode to write-through mode.
v
You must configure the controllers in an active-passive mode, where all logical
drives are defined on only one controller in the pair.
Note: If both controllers have logical drives configured, the controllers will not be
configured as a fault-tolerant pair.
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Hot-spare drives are not supported in a failover environment except for the
built-in hot-spare that is part of a RAID level-5E logical drive.
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A fault-tolerant pair must not contain any ready physical drives. All physical drives
must be configured in arrays.
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All logical drives must have unique shared merge-group numbers.
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Each set of controllers must have a unique set of controller names and partner
names when using multiple fault-tolerant pairs in a system.
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No hot-add backup controllers can be added to a system.
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All on-board ServeRAID controllers must be enabled, even if the controller is not
used.
Preparing the controllers
Note: The cables to the drive enclosures must not be attached when you start the
server.
1. Insert the IBM ServeRAID Support CD (or the configuration CD that was
included with your server) into the CD-ROM drive; then, turn on the server.
The ServeRAID Manager program starts.
Note: If the ServeRAID Manager program opens in Configuration mode, a
window similar to the following opens. Click Cancel to go to Information
mode and go to the next step.
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IBM
®
User’s Reference: ServeRAID
™
-4 Ultra160 SCSI Controller