Specifications

7–14 CLI Commands
Specify COPY=FAST to allow the creation of mirrored data to take precedence over
other controller operations. When you specify COPY=FAST, the controller uses more
resources to create the mirrored data, and copying takes less time. However, overall
controller performance is reduced during copying.
Specify COPY=NORMAL when operations performed by the controller should take
priority over the copy operation. If you specify COPY=NORMAL, creating the
mirrored data has a minimal impact on performance.
POLICY=BEST_FIT
POLICY=BEST_PERFORMANCE (Default)
NOPOLICY
Sets the selection criteria the controller uses to choose a replacement disk from the
spareset when a mirrorset member fails.
Specify POLICY=BEST_FIT to choose a replacement disk drive from the spareset
that equals or exceeds the base member size (smallest disk drive at the time the
mirrorset was initialized). If there is more than one disk drive in the spareset that
meets the criteria, the controller selects a disk drive with the best performance.
Specify POLICY=BEST_PERFORMANCE to choose a replacement disk drive from
the spareset with the best performance. The controller attempts to select a disk on a
different port than existing mirrorset members. If there is more than one disk drive in
the spareset matching the best performance criteria, the controller selects a disk drive
that equals or exceeds the base member size.
Specify NOPOLICY to prevent the controller from automatically replacing a failed
disk device. The mirrorset operates in a reduced state until a POLICY=BEST_FIT or
POLICY=BEST_PERFORMANCE is selected, or a member is manually placed in
the mirrorset (see “SET mirrorset-name,” page 7–110).
READ_SOURCE=disk-name
READ_SOURCE=LEAST_BUSY (Default)
READ_SOURCE=ROUND_ROBIN
Selects the mirrorset member used by the controller to satisfy a read request.