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5–78 CLI Commands
The actual number of members in the mirrorset can never be greater than the nominal
number of members. The disks to be removed do not need to be members of the same
mirrorset. However, the disks must all be part of the same unit (for example, the same
striped mirrorset). When a disk is reduced from a mirrorset, the controller:
■ Pauses I/O to the unit.
■ Flushes all of the unit’s data from write-back data cache.
■ Removes the specified disks.
■ Decreases the nominal number of members of the mirrorsets by the number of
disks removed from the mirrosets.
For each reduced mirrorset, there must be at least one remaining normal member after
the reduction. If this is not true for all of the disk-names specified, the mirrorset is not
reduced.
Only normal members can be reduced. A normal member is a mirrorset member
whose entire contents are the same as all other normal members within the mirrorset.
NOTE: An error is displayed if you attempt to reduce any mirrorset so that there
would not be any normal member remaining.
Syntax
REDUCE disk-name1 disk-name2 disk-name3...
Parameters
disk-name1 disk-name2 disk-name3...
Specifies the names of the disk or disks to be removed from the mirrorset or
mirrorsets. Multiple members can be removed with the REDUCE command.