User`s guide

7. For each mirrorset in the unit, use the SET MEMBERSHIP command to
increase the nominal membership of the mirrorset by one. This will provide
the member slot for the snapshot member.
CLI> SET mirrorset-container-name MEMBERSHIP= n
8. For each mirrorset in the unit, use the SET REPLACE= command to add the
target snapshot disk you desire into that mirrorset. At this point, the copy to
the snapshot disk will begin.
CLI> SET mirrorset-container-name REPLACE= disk-device-name
9. Monitor all the mirrorsets for copy completion. When all members are in
normal state, the extraction can be done.
CLI> SHOW THIS_CONTROLLER
CLI> SHOW OTHER_CONTROLLER
10. Extract all snapshot members from all the mirrorsets in the unit with a
single REDUCE command. Name each of the snapshot disks on the same
line; all will be removed at once.
CLI> REDUCE disk-device-name1 disk-device-name2
11. For each device that you issued a MIRROR command, issue an UNMIRROR
command to eliminate the temporary mirrorset. If the unit is layered on
permanent mirrorsets, do not perform this command.
CLI> UNMIRROR disk-device-name1
12. For each permanent mirrorset in the unit, use the SET MEMBERSHIP
command to reduce the nominal membership back to where it was when you
started.
CLI> SET mirrorset-container-name MEMBERSHIP= n
13. For each permanent mirrorset, use the SET POLICY= command to restore
the replacement policy you want during normal operation.
CLI> SET mirrorset-container-name POLICY= BEST_FIT or BEST_PERFORMANCE
6.10.1 Configuring Host Units into Mirrorsets
Now that you have the snapshot copies in the form of the individual snapshot
disks, the following steps are necessary to configure usable host units from those
disks:
1. If the snapshot is of a striped mirrorset, for each of the snapshot disks, create
a one-member mirrorset consisting solely of the snapshot disk. For example:
CLI> ADD MIRROR mirrorset-name-1 snapshot-disk-name-1
CLI> ADD MIRROR mirrorset-name-2 snapshot-disk-name-2
Then create a stripeset consisting of the mirrorsets just defined:
CLI> ADD STRIPESET stripeset-name mirrorset-name-1 mirrorset-name-2
Working with RAID Arrays 6–21