HP storageworks HSG80 Reference Manual page 32

CLI Command Descriptions
These switches are described in the following paragraphs:
COPY=FAST
COPY=NORMAL (default)
Sets the speed at which the controller copies data to a new member from normal
mirrorset members:
• 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.
• 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 allow the software 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 more than one disk drive in the spareset matches 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-nameSET
mirrorset-nameSET mirrorset-namepage 2–130).
READ_SOURCE=LEAST_BUSY (default)
READ_SOURCE=ROUND_ROBIN
Selects the mirrorset member used by the controller to satisfy a read request.
2–16 HSG80 Array Controller V8.7 Command Line Interface Reference Guide