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rapidrecovery=all|rebuild|disable attribute specifies the Rapid RAID
Recovery setting for the unit being created. Rapid Raid Recovery can speed
up the rebuild process, and it can speed up initialize and verify tasks that may
occur in response to an unclean system shutdown. Setting this option to all
applies this policy to both these situations. Setting it to rebuild applies it only
to rebuild tasks. If the policy is set to disable, then none of the tasks will be
sped up.
Notes:
Once the rapidrecovery policy has been disabled for a unit, it cannot be
changed again. Disabling this policy is required if you want to move a unit to a
controller that has firmware earlier than 9.5.1.
There is some system overhead from setting rapidrecovery to all. If you have a
BBU, you can set rapid recovery to rebuild, as a BBU provides protection against
data loss in the event of an unclean shutdown.
This attribute is only for redundant units created on controller models 9650SE and
9690SA, with the 9.5.1 firmware or later.
Rapid RAID Recovery is not supported over migration.
v0=n or vol=a:b:c:d may be used to divide the unit up into multiple volumes.
v0=n can be used if you only want two volumes, in which case v0=n is used
to define the size of the first volume, and the second volume will use the
remaining space. One way in which this can be useful is if you want to create
a special volume to function as a boot volume, with a separate volume for
data.
vol=a:b:c:d can be used to specify sizes for up to four volumes.
The value(s) should be positive integer(s) in units of gigabytes (GB), with a
maximum of 32 TB. If you specify a size that exceeds the size of the unit, the
volume will be left "uncarved."
Both v0=n or vol=a:b:c:d work in conjunction with auto-carving, if that
feature is enabled. When auto-carving is used, v0=n and vol=a:b:c:d are
used to specify the size of the first few volumes, after which the auto-carve
size is used for additional volumes. (For more about auto-carving, see "/cx set
autocarve=on|off" on page 77 and "/cx set carvesize=[1024..32768]" on
page 78.)
Example of RAID 5 unit created with first volume set to 10 GB:
//localhost> /c0 add type=raid5 disk=2-5 v0=10
Creating new unit on Controller /c0 ... Done. The new unit is /
c0/u0.
Setting write cache=ON for the new unit ... Done.
Setting default Command Queuing Policy for unit /c0/u0 to [on]
... Done.
After the unit creation, a subsequent show command for the unit shows the
the volume size(s):
//localhost> /c0/u0 show
Controller Object Commands
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