Silicon Graphics InfiniteStorage 6120, User Manual

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Configuring the InfiniteStorage 6120
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2.3.9 Creating Spare Pools
The InfiniteStorage 6120 supports the concept of a spare pool. A spare pool contains physical disks
that can be used as spare disks in one or more storage pools.
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.
Spare pools can be shared by storage pools or dedicated to a particular , 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
drive(s) from the unassigned pool and assign it to the spare pool.
NOTE : For maximum performance, create spare pools using drives with the same
characteristics as those drives within the storage pool(s) for which they are designated to
spare. The characteristics include items like SAS/SATA, capacity, and RPM.
To create a spare pool:
1. At the CLUI prompt, type:
CREATE SPARE_POOL (Figure 37)
A message is displayed to indicate whether the new spare pool creation was successful.
2. Assign disk(s) to the spare pool, enter command:
ASSIGN PHYSICAL_DISK <disk-id> TO_POOL <pool-id>
where <disk-id> is the index name of the disk to be added.
To view the list of unassigned disks, enter command
SHOW UNASSIGNED_POOL
PHYSICAL_DISK
A message is displayed to indicate whether the disk has been added to the spare pool
(Figure 38)
.
3. Use the CREATE SPARE_POOL and ASSIGN PHYSICAL_DISK commands to create more
spare pools as needed.
If you need to delete a disk from the spare pool, enter command
ASSIGN PHYSICAL_DISK
<disk-id> TO_POOL 0x1800ffff
To delete a spare pool, enter command
DELETE SPARE_POOL <pool-id>
4. To view the list of configured spare pool(s), enter command
SHOW SPARE_POOL * (Figure 39)
.
RAID$ create spare_pool
SPARE POOL 6 OID=0x19bc0006 create STATUS=’Success’
Figure 37. CREATE SPARE POOL Example Screen
RAID$ assign physical_disk 0x004e to_pool 6
PHYSICAL_DISK 78 OID=0x20b6004e assigned to POOL 6 OID=0x19bc0006STATUS=’Success’
Figure 38. Assign Physical Disk to Spare Pool Example Screen
Figure 39. Show Spare Pool Example Screen (1)
RAID$ show spare_pool *
OID: 0x19bc0006 Index: 0x0006 Name: 19bc0006