Dell PowerVault MD3220 - Multi-Path Software

52 Configuring a Storage Array
The freeCapacityArea parameter defines the free capacity area to use for the
virtual disk. If a disk group has several free capacity areas, you can use this
parameter to identify which free capacity area to use for virtual disk creation.
You do not have to assign the entire capacity of the physical disks to the
virtual disk. Assign any unused space to another virtual disk at another time.
The userLabel, capacity, owner, and segmentSize parameters are the same as in
the previous versions of the create virtualDisk command.
Enclosure Loss Protection
The enclosureLossProtect parameter is a boolean switch that turns enclosure
loss protection on or off. To work properly, each physical disk in a virtual disk
group must be in a separate enclosure. Enclosure loss protection is set under
the following conditions:
• You assign the physical disks.
• The RAID controller module assigns the physical disks.
The following table shows possible results for the enclosureLossProtect
parameter. The results depend on whether you assign the physical disks or the
RAID controller module assigns the physical disks.
The enclosureLossProtect parameter is not valid when creating virtual disks on
existing disk groups.
Method enclosureLossProtect=
TRUE
enclosureLossProtect=FALSE
Yo u a s s i g n t h e p h y s i c a l
disks.
If you select more than one
physical disk from any one
enclosure, the storage array
returns an error.
The storage array performs the
operation, but the created disk
group does not have enclosure
loss protection.
The RAID controller
module firmware
assigns the physical
disks.
The storage array posts an
error if the RAID controller
module firmware cannot
provide physical disks to
ensure that the new disk
group has enclosure loss
protection.
The storage array performs the
operation even if it means that
the disk group might not have
enclosure loss protection.
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