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Compaq HSZ80 Array Controller ACS Version 8.3 Configuration and CLI Reference Guide
REDUCE
Removes member disk drives from mirrorsets and decreases the nominal number of
members in the mirrorsets.
Unlike the SET mirrorset-name REMOVE=disk-name command, the controller does
not put reduced members into the failedset. When using the REDUCE command to
take a snapshot of a striped mirrorset, you must reduce all mirrorsets with one
command. The CLONE utility does this automatically.
NOTE: An error is displayed if you attempt to reduce the only remote or local
normal member from the mirrorset if ERROR_MODE= FAILSAFE is enabled on the
unit.
The nominal number of members in a mirrorset is determined by the number of
members assigned to the mirrorset with the SET mirrorset-name
MEMBERSHIP=number-of-members command or the ADD MIRRORSET
mirrorset-name disk-name1 [disk-nameN] command—in other words, the number of
disks that the mirrorset originally contained before it was reduced. The actual number
of members contained in the mirrorset may be less than the nominal number of
members if:
■ A disk drive is not added back to the mirrorset.
■ A member remains removed from the mirrorset.
■ The mirrorset replacement policy switch NOPOLICY is specified with the SET
mirrorset-name command.
■ No spare disks exist.