Users Guide

When a physical disk fails in a redundant virtual disk, the failed disk is rebuilt onto the hot spare. In this
case, the controller firmware reassigns the slot containing the failed disk as the hot spare. In this
circumstance, a disk not previously assigned as a global hot spare becomes a hot spare through failure or
removal.
To ensure that the controller firmware always has a healthy physical disk as a global hot spare:
• Unassign the hot spare that is assigned as a global hot spare before removing and reassigning a
physical disk that is assigned as a global hot spare, unassign the hot spare before removal and
reassign another physical disk as the global hot spare.
• Immediately replace any physical disk that has failed or been removed. This ensures that a healthy disk
resides in a slot that the controller firmware assumes is a hot spare.
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