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88 SANRAD V-Switch User Manual
Creating a Transparent Volume
Transparent volumes
cannot be used in
further volume
hierarchies.
Tape devices must
be virtualized as
transparent volumes.
You can take a physical disk and its existing configured storage data and
convert it to a directly accessible, or transparent, virtual volume using the
CLI command volume create transparent. A transparent volume is
ready for direct host exposure. Please refer to “Volume Exposure &
Security,” page 107.
Certain vendor storage devices have vendor-specific SCSI commands. To
support these SCSI commands, you can convert these storage devices and
their contained data to transparent volumes.
This is useful if you have a functioning and fully configured RAID module
that you want to use ’as is’. All RAID configurations will be maintained in
the transparent volume.
volume create transparent
You need to define two parameters to create a transparent volume:
SWITCH PARAMETER DEFINITION STATUS EXAMPLE
–vol
VOLUME ALIAS USER-ASSIGNED
ALIAS FOR THE
VOLUME
O
PTIONAL
DEFAULT:
STORAGE ALIAS
Trans1
-d
DISK ALIAS ALIAS GIVEN TO
THE DISK DURING
DISK AUTO
-
DISCOVERY
MANDATORY
Disk1
Example:
If you are working in
a V-Switch cluster,
this volume must be
configured on both
V-Switches.
In Figure 36, page 89, the logical unit, LUN0 on Disk 1, is converted
directly to a virtual transparent volume, Transparent 1. This RAID device
has only one LUN. For each LUN configured on a RAID device, the V-
Switch registers a disk. Therefore, a RAID device with five LUNs will
appear to the V-Switch as five disks.
volume create transparent –vol Trans1 –d Disk1