Dell PowerVault MD3260i - Manual (Page 158)

Parameter Description
• allMedia — Use this option when you want to use all types of
physical disk media that are in the expansion enclosure.
physicalDiskType The type of physical disk that you want to use in the virtual disk. You
cannot mix physical disk types. The valid physical disk type is SAS. You
must specify a physical disk type.
capacity The size of the virtual disk that you are adding to the storage array. Size is
defined in units of bytes, KB, MB, GB, or TB. The following examples show
the syntax:
capacity=500 bytes
capacity=2 GB
NOTE: A space must be added between the last digit and the size
(bytes, KB, MB, or GB) for values greater than 9. If you do not specify
a capacity, all the available physical disk capacity in the disk group is
used. If you do not specify the capacity unit, bytes is used as the
default unit.
owner The setting for which RAID controller module owns the disk group. 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.
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 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.
usageHint The setting for both the cacheReadPrefetch 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
virtual disk. Valid values are fileSystem, dataBase, or
multiMedia.
enclosureLossProtect The setting to enforce enclosure loss protection when you create the disk
group. 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 disk
group. To enforce drawer loss protection, set this parameter to TRUE. The
default value is FALSE.
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.
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