HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Command Line Interface Reference Guide (EK-G80CL-RA. C01, March 2005)

CLI Command Descriptions
218 HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Command Line Interface Reference Guide
■ 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 of the mirrorset.
■ 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.
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.
■ Specify READ_SOURCE=disk-name for a specific member to which
you want the controller to direct all read requests. If the member fails out
of the mirrorset, the controller selects the first normal member it finds to
satisfy its read requests.
■ Specify READ_SOURCE=LEAST_BUSY to direct read requests to the
mirrorset member with the least amount of work in its queue. If multiple
members have equally short queues, the controller queries these members
for each read request as it would if READ_SOURCE=ROUND_ROBIN is
specified.
■ Specify READ_SOURCE=ROUND_ROBIN to sequentially direct read
requests to each mirrorset member. The controller equally queries all
normal members for each read request.
REMOVE=disk-name
Instructs the controller to remove a member from an existing mirrorset. The
disk drive specified by disk-name is removed from the mirrorset specified
by mirrorset-name. The removed disk drive is added to the failedset.
Note: No other switches can be set if the REMOVE switch is specified.