Compaq HSZ80 manual Reduce

5–77

REDUCE

Removes member disk drives from mirrorsets and decreases the nominal number of members in the mirrorsets.

Unlike the SET mirrorset-nameREMOVE=disk-namecommand, 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-nameMEMBERSHIP=number-of-memberscommand or the ADD MIRRORSET mirrorset-namedisk-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-namecommand.

■No spare disks exist.

Compaq HSZ80 Array Controller ACS Version 8.3 Configuration and CLI Reference Guide