SANRAD I3.1.1205 - Manual (Page 171)

Chapter 8: Advanced Volume Operations 8-19
If you are working in
a V-Switch cluster, a
volume must be
resized on both V
Switches.
You can increase a virtual volume’s potential capacity using the CLI
command volume resize. This is the first step in increasing a virtual
volume’s actual capacity. Potential capacity is the maximum capacity a
volume could be. Actual capacity is the capacity that the server recognizes
a virtual volume as having.
Resizing a volume is done while the top-level volume in the hierarchy is
exposed on an iSCSI target. Simple, snapshot, concatenated and previously
resized volumes can be resized. Resizing a volume concatenates a new volume
with the source volume. Only a simple volume can be used to resize a simple
or snapshot volume.
After one or more volumes in a hierarchy are resized, the volume must be
expanded to make its actual capacity equal to its new potential capacity. See
“Expanding a Volume”.