Silicon Graphics InfiniteStorage 6120, User Manual

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Configuration Management
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3.2.3 Spare Pool Management
The InfiniteStorage 6120 supports the concept of a spare pool which contains physical disks that can
be used as spare disks. Spare pools can be shared by storage pools or dedicated to a particular storage
pool in which case the spare disks will only be used by the designated storage pool. After a spare pool
is created, you will need to select drives from the unassigned pool and assign them to the spare pool.
In the event of drive failure, a drive that is assigned to a spare pool is automatically swapped into the
storage pool to replace the failed drive. A rebuild then occurs immediately, reducing the possibility
of data loss due to additional drive failures.
NOTE : Each storage pool must have a spare pool assigned to it. If a storage pool’s
attributes show
Global Spare Pool: UNASSIGNED
, no spare pool will serve this
storage pool.
3.2.3.1 Creating a Spare Pool
Use these commands to create a spare pool, add disks to the spare pool, and assign the spare pool to
a storage pool:
•
CREATE SPARE_POOL
•
ASSIGN PHYSICAL_DISK <disk-id> TO_POOL <spare-pool-id>
•
SET POOL <pool-id> SPARE_POOL <spare-pool-id>
where <pool-id> and <spare-pool-id> are the index names of the storage pool and spare pool,
respectively.
3.2.3.2 Naming a Spare Pool
SET SPARE_POOL <pool-id> NAME=”<name>”
lets you specify a name to identify the spare
pool.
3.2.3.3 Deleting a Spare Pool
To delete a disk from the spare pool, enter the command
ASSIGN PHYSICAL_DISK <disk-id> TO_POOL 0x1800ffff
.
To delete a spare pool, enter the command
DELETE SPARE_POOL <pool-id>
.