HP storageworks HSG80 Reference Manual page 208

CLI Command Descriptions
UNMIRROR
Converts a one-member mirrorset back to a nonmirrored disk drive and deletes the
mirrorset from the list of known mirrorsets. This command can only be used on
mirrorsets already members of higher-level containers (stripesets or units).
The UNMIRROR command is not valid for disk drives having a capacity greater than
the capacity of the existing mirrorset. If a mirrorset is comprised of disk drives with
different capacities, the mirrorset capacity is limited to the size of the smallest
member; larger members contain unused capacity. If a member with unused capacity
is the last remaining member of a mirrorset, the UNMIRROR command cannot be
used to change the disk drive back to a single-disk unit. This change would cause a
change in the reported disk capacity, possibly corrupting user data.
Syntax
UNMIRROR disk-name
Parameters
disk-name
Specifies the name of the normal mirrorset member to be removed from a mirror
storageset.
Switches
There are no switches associated with this command.
Example
To convert DISK10300 back to a single device, enter:
UNMIRROR DISK10300
See Also
ADD MIRRORSETS
MIRROR
REDUCE
RUN CLONE
SET mirrorset-name
2–192 HSG80 Array Controller V8.7 Command Line Interface Reference Guide