User's Manual

Operations 98
Size
This parameter specifies the size of the logical drive.
Use the following values to set the size:
• N—The size in MB
• MAX—Uses all available unused space in the array for the logical drive. This value is the default.
• MAXMBR—Creates the largest size of volume supportable by a 32-bit MBR (2TiB)
In Reconfigure mode, the default setting is the existing size of the logical drive. If you enter a larger value, HP
SSA extends the logical drive to the new size if there is unused drive capacity on the same array, as long as
the operating system supports logical drive extension. You cannot reduce the size of the logical drive.
CAUTION: Back up all data before extending a logical drive.
SizeBlocks
This option specifies the size of the logical drive in 512-byte blocks. Use this option to set an exact size
without rounding.
When HP SSA Scripting captures a configuration, it reports volume sizes rounded down to the nearest MB.
When the capture is played back, the size is reduced to fit within the already rounded MB size. This option
prevents the loss of volume size over successive generations of captures.
However, if the size does not fit the geometry of the array, caused by different disks or RAID levels, the size
will be rounded down to fit the geometry.
SmartCache Write-back
CAUTION: Specifying the write-back cache write policy could result in data loss in the event of
failure of the cache volume. When using a RAID 0 cache volume, a single SSD failure might result
in data loss.
IMPORTANT: If a demo license key expires, all SmartCache volumes configured with write-back
cache write policy are converted to write -through. When this happens, the logical drive details
show different values for Cache Write Policy and Cache Write Policy Requested. If the license is
reinstalled, the SmartCache volumes are restored to their original write-back cache write policy.
This option enables write-back cache support. Command options are Writethrough or Writeback.
Example: CacheWritePolicy=[Writethrough | Writeback]
SSDOPO
This option sets the over provisioning optimization parameter at volume creation time through the command
Enable. This option is not supported on all array controllers, and only supported on some SSDs. This option
is not valid in reconfigure mode.
StripSize
Beginning with HP SSA, HP SSA CLI, and HP SSA Scripting, the StripSize option replaces the
StripeSize option. When distributing data across multiple physical drives (striping), the strip size is the