NEC Express 5800 Series User Manual page 75

without rounding.
When 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
This option is not supported.
SSDOPO (SSDOverProvisioningOptimization)
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 SSA, SSA CLI, and 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 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

512—512 KB

1024—1024 KB
The default strip size value depends on the action mode:

In Configure action mode, the default value is determined by the RAID level that you specified earlier in
the script.

In Reconfigure action mode, the default value for this option is the strip size that is already configured
for the logical drive. If you enter a value that is different from the existing strip size, SSA attempts to
migrate the logical drive to the strip size that you specify. (If you intend to migrate the logical drive, back
up all data before starting the migration procedure.)
Encryption support commands
These commands are not supported.
SSA Scripting 75