HP Smart Storage Administrator - Manual (Page 87)

Operations 87
• 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.
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
amount of data that is written to each physical drive. The full stripe size refers to the combined size of all the
strips across all physical drives, excluding parity-only drives.
You can enter a numerical value for this option to specify the size of the data strips (in kilobytes), or you can
leave this option blank and allow HP SSA to use a default value.
Strip sizes available for a RAID level vary based on the controller and the controller firmware level. The
maximum strip size changes dynamically and is reduced for arrays with a large number of data drives or
with smaller controller cache sizes. The controller must be able to read an entire strip of data at a time into
cache memory during transformation. Available memory is the limiting factor.
The following strip sizes are available:
• 8—8 KB
• 16—16 KB
• 32—32 KB
• 64—64 KB
• 128—128 KB
• 256—256 KB