Dell PowerVault MD3260i - Manual (Page 171)

Parameter Description
NOTE: If you do not specify a capacity, all physical
disk capacity available in the disk group is used. If
you do not specify capacity units, bytes are used as
the default. A space must be added between the last
digit and the size (MB, GB, or KB) for values greater
than 9.
owner RAID controller module that owns the virtual disk. Valid
RAID controller module identifier values are 0 and 1. The
identifier value is 0 for the RAID controller module on the
top and 1 for the RAID controller module on the bottom
when viewed from the rear of the enclosure. If you do not
specify an owner, the RAID controller module firmware
determines the owner.
NOTE: The owner parameter defines which RAID
controller module owns the virtual disk. The preferred
owner of a virtual disk is the RAID controller module
that currently owns the disk group.
cacheReadPrefetch The setting to turn on or turn off cache read prefetch. To
turn on cache read prefetch, set this parameter to TRUE.
To turn off cache read prefetch, set this parameter to
FALSE.
segmentSize Amount of data (in kilobytes) that the RAID controller
module writes on a single physical disk in a virtual disk
before writing data on the next physical disk. Valid values
are 8, 16, 32, 64, 128, 256, or 512. For information
about the segmentSize parameter, see Using The Auto
Configure Command.
usageHint The settings for both the cacheReadPrefetch
parameter and the segmentSize parameter should be
the default values. The default values are based on the
typical I/O usage pattern of the application that is using
the virtual disk. Valid values are fileSystem,
dataBase, or multiMedia.
dssPreAllocate The setting to make sure that reserve capacity is allocated
for future segment size increases. The default value is
TRUE.
securityType The setting to specify the security level when creating the
disk groups and all associated virtual disks.
• none—The disk group and virtual disks are not
secure.
• capable—The disk group and virtual disks are
capable of having security set, but security has
not been enabled.
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