APC iSCSI SATA II - Manual (Page 54)

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UDV operations description:
Extend Extend a Virtual disk capacity.
Scrub Scrub a Virtual disk. It’s a parity regeneration function. It
supports RAID 3 / 5 / 6 only.
Delete Delete a Virtual disk.
Set property Change the VD name, right, priority and bg rate.
Right options:
“WT” Æ Write Through.
“WB” Æ Write Back.
“RO” Æ Read Only.
Priority options:
“HI” Æ HIgh priority.
“MD” Æ MiD priority.
“LO” Æ LOw priority.
Bg rate options:
“4 / 3 / 2 / 1 / 0” Æ Default value is 4. The
higher number the background priority of a VD
has, the more background I/O will be scheduled to
execute.
Attach LUN Attach to a LUN.
Detach LUN Detach to a LUN.
List LUN List attached LUN(s).
More
information
Show Virtual disk detail information.