HP storageworks HSG80 Reference Manual page 98

CLI Command Descriptions
Switches
The following switches are available for use with the MIRROR command:
• COPY
• POLICY and NOPOLICY
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 when data is being mirrored to the storageset's disk drives:
• 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 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.
2–82 HSG80 Array Controller V8.7 Command Line Interface Reference Guide