Filter
Top Products
Chapter 8: Advanced Volume Operations 153
Resizing a Volume
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,” page 158.
In Figure 84, is a mirrored volume with a potential capacity of one terabyte.
The smallest child of the mirrored volume determines the mirrored
volume’s potential capacity. Resizing the one-terabyte child to two
terabytes will increase the mirrored volume’s potential capacity to two
terabytes. The actual capacity of the mirrored volume remains unchanged
until it is expanded to match its potential size.
10251
Mir
Ch 2
1T
1T
Ch 1
2T
Sim3
1T
Figure 84. Asymetrical Mirrored Volume
When a simple or snapshot volume is resized with another simple volume,
the first step in their resize concatenation is the creation of a cube. A cube is
a special type of volume intermediary created for resizing a volume
through concatenation. In Figure 85, page 154, the original connection to
the child to resize is broken and transferred to the cube. A cube’s default
alias is X+resized volume’s alias. In Figure 85, page 154, the alias of the
volume to resize is Ch2; the alias of the cube isXCh2.