IBM System Storage DS3000 Programming Manual page 274

Parameter
logicaldrive or logicaldrives
logicaldrive
addCapacity
addDrives
cacheFlushModifier
cacheReadPrefetch
cacheWithoutBatteryEnabled
mediaScanEnabled
mirrorCacheEnabled
modificationPriority
3-228
IBM System Storage DS3000, DS4000, and DS5000: Command Line Interface and Script Commands Programming Guide
Description
The name of the specific logical drive for which you
want to define properties. (You can enter more than one
logical drive name if you use the logicaldrives
parameter.) Enclose the logical drive name in double
quotation marks (" ") inside of square brackets ([ ]).
The World Wide Identifier (WWID) of the logical drive
for which you are setting properties. You can use the
WWID instead of the logical drive name to identify the
logical drive. Enclose the WWID in angle brackets (< >).
The setting to increase the storage size (capacity) of the
logical drive for which you are defining properties. Size
is defined in units of bytes, KB, MB, GB, or TB. The
default value is bytes.
This parameter is not valid for thin logical drives.
The setting to add new drives to the logical drive. For
high-capacity drive expansion enclosures, specify the
enclosure ID value, the drawer ID value, and the slot ID
value for the drive. For low-capacity drive expansion
enclosures, specify the enclosure ID value and the slot ID
value for the drive. Enclosure ID values are 0 to 99.
Drawer ID values are 1 to 5. Slot ID values are 1 to 32.
Enclose the enclosure ID value, drawer ID value, and the
slot ID value in parentheses. Use this parameter with the
addCapacity parameter if you need to specify additional
drives to accommodate the new size.
This parameter is not valid for disk pool logical drives or
for thin logical drives.
The maximum amount of time that data for the logical
drive stays in cache before the data is flushed to physical
storage. Valid values are listed in the Notes section.
The setting to turn on or turn off cache read prefetch. To
turn off cache read prefetch, set this parameter to FALSE.
To turn on cache read prefetch, set this parameter to
TRUE.
The setting to turn on or turn off caching without
batteries. To turn on caching without batteries, set this
parameter to TRUE. To turn off caching without batteries,
set this parameter to FALSE.
The setting to turn on or turn off media scan for the
logical drive. To turn on media scan, set this parameter
to TRUE. To turn off media scan, set this parameter to
FALSE. (If media scan is disabled at the storage subsystem
level, this parameter has no effect.)
The setting to turn on or turn off the mirror cache. To
turn on the mirror cache, set this parameter to TRUE. To
turn off the mirror cache, set this parameter to FALSE.
The priority for logical drive modifications while the
storage subsystem is operational. Valid values are
highest, high, medium, low, or lowest.