HP Array Controller HSG V8.7 Software - Manual (Page 289)

CLI Commands B–17
Specify READ_SOURCE=LEAST_BUSY to direct read requests to
the mirrorset disk with the least amount of work in its queue. If
multiple members have equally short queues, the controller queries
normal disks for each read request as it would when READ_SOURCE=
ROUND_ROBIN is specified.
Specify READ_SOURCE=ROUND_ROBIN to sequentially direct read
requests to each mirrorset disk. The controller equally queries all
normal disks for each read request.
Examples
To add DISK10000, DISK20100, and DISK30200 as a mirrorset with
the name MIRR1, type:
ADD DISK DISK10000 1 0 0
ADD DISK DISK20100 2 1 0
ADD DISK DISK30200 3 2 0
ADD MIRRORSET MIRR1 DISK10000 DISK20100 DISK30200
The following example shows how to create a host-addressable unit
after the mirrorset MIRR1 has been created:
INITIALIZE MIRR1
ADD UNIT D104 MIRR1
See also
ADD DISK
ADD UNIT
DELETE container-name
INITIALIZE
MIRROR
REDUCE
SHOW mirrorset-name
SHOW MIRRORSETS
SHOW STORAGESETS
UNMIRROR