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5–72 CLI Commands
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. This switch is not valid if
DT_SUPPORT is enabled.
Specify NOPOLICY to prevent the controller from automatically replacing a failed
disk device. This causes the mirrorset to operate in a reduced state until either
POLICY=BEST_PERFORMANCE or POLICY=BEST_FIT is selected, or a
member is manually placed in the mirrorset (see “SET mirrorset-name,” page 5–112).
Example
This example shows how to create a one-member mirrorset from each member of a
stripeset. These commands set the nominal number of members in each mirrorset to
two and add a second disk to each mirrorset. It is not necessary to initialize the
mirrorsets or add them as units; the higher-level structure of the stripeset is carried
down to the mirrorsets.
ADD DISK DISK10100 1 1 0
ADD DISK DISK20100 2 1 0
ADD DISK DISK30100 3 1 0
ADD STRIPESET STRIPE1 DISK10100 DISK20100 DISK30100
INITIALIZE STRIPE1
ADD UNIT D102 STRIPE1
MIRROR DISK10100 MIRROR1
SET MIRROR1 MEMBERSHIP=2
SET MIRROR1 REPLACE=DISK20200
MIRROR DISK20100 MIRROR2
SET MIRROR2 MEMBERSHIP=2
SET MIRROR2 REPLACE=DISK30200
MIRROR DISK30100 MIRROR3
SET MIRROR3 MEMBERSHIP=2
SET MIRROR3 REPLACE=DISK10200