Performing stripe size migration
To perform a migration of a logical drive to a different stripe size, use the command:
saconfig /dev/cissX -M <Logical drive #> -S <Stripe size (KB)>
For example:
# saconfig /dev/ciss5 -M 0 -S 64
Logical drive 0 migrated from stripe 16 to 64 KB
Extending the capacity of a logical drive
WARNING!
The logical drive capacity specified with option
c
must be larger than the existing
capacity, or data loss occurs.
To extend the capacity of a logical drive in an array by adding storage space from existing physical
disks, use the command:
saconfig /dev/cissX -E <Logical drive #> -c <capacity in GB>
For example:
# saconfig /dev/ciss5 -E 0 -c 15
Logical drive 0 extended from 10.0 GB to 15 GB in capacity
Expanding the capacity of an array
To add physical disks to an array, use capacity expansion. The number of logical drives that exists
in the array before the expansion remains the same, and the capacity of each logical drive that
exists in the array remains unchanged. Expansion only increases the amount of free space in the
array.
To expand the capacity of an array by adding physical disks, use the command:
saconfig /dev/cissX –E <Logical drive #> -p <physical drive id> [-p
<physical drive id>...]
For example:
# saconfig /dev/ciss5 -E 0 -p 2I:1:16 -p 2I:1:14
Logical drive 0 expanded from 4 to 6 physical drives
NOTE:
You can specify any logical drive in an array with
-E <Logical drive #>
to expand
the array. The data in all logical drives in the array is redistributed to make use of the added
physical disk space.
Changing the expand priority
To change the expand priority of the controller to low, medium, or high, use the following command:
saconfig /dev/cissX -e [low|medium|high]
Where:
cissX
The device file for the Smart Array controller.
[low|medium|high]
The priority level of the capacity expansion.
When you create a logical drive after the controller configuration is cleared, or after the last logical
drive is deleted, the expand priority of the controller defaults to “medium.” You can use
saconfig
with the
-e
option to change the expand priority.
The expand priority setting applies to both
“Extending the capacity of a logical drive”
and
“
Expanding the capacity of an array
.”
52
Configuration
