HP Smart Array 6400 Series Controllers Support Guide, September 2007

NOTE: If you do not specify a stripe size using -S <Stripe size (KB)>, the default stripe
size will be used.
Performing Stripe Size Migration
To perform a migration of an existing 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
To extend the capacity of an existing logical drive in an array by adding new storage space from
the 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
WARNING! The logical drive capacity specified with option c must be larger than the existing
capacity, or data loss will occur.
Expanding the Capacity of an Array
Use capacity expansion to add physical disks to an array that has already been configured. 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 new physical disks, use the command:
saconfig /dev/cissX -E <Logical drive #> -p <Channel:Target> [-p
<Channel:Target> ...]
For example:
# saconfig /dev/ciss5 -E 0 -p 2:4 -p 2:5
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 of the existing logical drives in the array will be 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 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 was cleared, or after the last
logical drive was deleted, the expand priority of the controller will default to “medium.” You
can use saconfig with the -e option to change the expand priority.
The saconfig Configuration CLI 53