IBM System Storage DS3000, Programming Manual

Page: 140 / 652

Parameters
Parameter Description
drives
The disk drives that you want to assign to the
logicalDrive. EnclosureID1, drawerID1, slotID1 ...
enclosureIDn, drawerIDn, slotIDn is for enclosures
with multiple disk drive drawers. For enclosures
without disk drive drawers, use enclosureID1, slotID1
... enclosureIDn, slotIDn instead. Enclosure ID values
are
0
to
99
. Drawer ID values are
1
to
5
. Slot ID values
are
1
to
32
. Enclose the values in parentheses.
subsystemUserLabel
The alphanumeric identifier (including – and _) that
you want to give the new subsystem. Enclose the
subsystem identifier in double quotation marks (" ").
raidLevel
The RAID level of the subsystem that contains the
logical drive. Valid values are
0 , 1 , 3 , 5 , or 6 .
userLabel
The name that you want to give the new logical drive.
Enclose the new logical drive name in double quotation
marks (“ ?).
capacity
The size of the logical drive that you are adding to the
storage subsystem. Size is defined in units of
bytes
,
KB
,
MB
,
GB
, or
TB
.
owner
The controller that owns the logical drive. Valid
controller identifiers are
a or b , where a is the
controller in slot A, and
b
is the controller in slot B. If
you do not specify an owner, the controller firmware
determines the owner.
cacheReadPrefetch
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
.
segmentSize
The amount of data (in KB) that the controller writes
on a single disk drive in a logical drive before writing
data on the next disk drive. Valid values are
8
,
16
,
32
,
64 , 128 , 256 , or 512 .
usageHint The settings for both the cachReadPrefetch parameter
and the
segmentSize
parameter to be default values.
The default values are based on the typical I/O usage
pattern of the application that is using the logical drive.
Valid values are
fileSystem
,
dataBase
, or
multiMedia
.
enclosureLossProtect
The setting to enforce enclosure loss protection when
you create the repository. To enforce enclosure loss
protection, set this parameter to
TRUE
. The default value
is
FALSE
.
drawerLossProtect The setting to enforce drawer loss protection when you
create the mirrored repository logical drive. To enforce
drawer loss protection, set this parameter to
TRUE . The
default value is
FALSE
.
dssPreAllocate
The setting to make sure that reserve capacity is
allocated for future segment size increases. This default
value is
TRUE
.
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IBM System Storage DS3000, DS4000, and DS5000: Command Line Interface and Script Commands Programming Guide