Digital Equipment HSZ40, Справочное руководство

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SET RAIDset-name 2–75
HSZ40 Array Controller CLI Reference Manual
SET
RAIDset-name
Changes the characteristics of a RAIDset.
Format
SET
RAIDset-name
Parameters
RAIDset-name
The name of the RAIDset that will have its characteristics modified.
Switches
POLICY=BEST_FIT
POLICY=BEST_PERFORMANCE (Default)
NOPOLICY
Specifies the replacement policy to use when a member within the RAIDset fails.
Select
BEST
_
FIT
to choose a replacement device from the spareset that most closely
matches the capacities of the remaining members. If more than one device in the spareset
is the correct size, the controller selects the device that gives the best performance.
Select
BEST
_
PERFORMANCE
to choose a replacement device from the spareset that results in
the best performance (the device should be on a different port than existing members). If
more than one device in the spareset has the best performance, the controller selects the
device that most closely matches the size of the remaining members.
Select
NOPOLICY
to prevent the controller from replacing a failed disk drive. This causes
the RAIDset to run in a reduced state until a
BEST
_
FIT
or
BEST
_
PERFORMANCE
policy is
selected, or a member is manually replaced in the RAIDset (see
SET
RAIDset-name).
RECONSTRUCT=NORMAL (Default)
RECONSTRUCT=FAST
The
RECONSTRUCT
switch allows you to set the speed at which the controller reconstructs
the data on a new RAIDset member that has replaced a failed member.
Select
NORMAL
to balance other controller operations against the reconstruct operation.
The controller uses relatively few resources to perform the reconstruct, and there is little
impact on performance.
Select
FAST
when the reconstruct operation must take precedence over other controller
operations. The controller uses more resources and the reconstruct takes less time, but
overall controller performance is reduced during the reconstruct.