Xsan 2 Administrator Guide - Adding a Storage Pool to a Volume

background image

Adding a Storage Pool to a Volume

You can add free space to a SAN volume by adding a storage pool to the volume.

If you’re expanding a volume that’s based on a built-in volume type, you can create a
new affinity tag and add LUNs to it. Xsan Admin creates and organizes storage pools
within that tag for you. If you add LUNs to an existing affinity tag, Xsan Admin fills out
any existing storage pool that has too few LUNs and, if there are enough LUNs, creates
storage pools for you.

If you’re expanding a custom volume, you create storage pools directly and add LUNs
directly to them.

Note: A volume can’t contain more than 512 storage pools.

To add a storage pool:


If necessary, connect the RAID systems that host the storage pool’s LUNs to the SAN

Fibre Channel network and power on the device.


In Xsan Admin, select Volumes in the SAN Assets list.


Select the volume in the list and choose Expand Volume from the Action (gear) pop-

up menu.


In the Label LUNs pane of the assistant, choose whether to label unlabeled LUNs

individually or sequentially based on a label prefix.
If you use a label prefix, Xsan Admin adds a number to the end of the prefix to create
a label for each LUN. For example, if you use the prefix “LUN,” your LUNs are labeled
“LUN1,” “LUN2,” and so forth. Already-labeled LUNs aren’t affected.
If you label LUNs individually, click Edit LUN Label on the next pane and enter a new


In the Configure Volume Storage pane, click New Affinity Tag (or New Pool) to add an

affinity tag (or storage pool), and then drag LUNs to the new tag (or pool).


Click Continue to unmount and stop the volume, add the new storage, and remount

the expanded volume.

From the Command Line
You can also add a storage pool by modifying the associated volume configuration file
in Terminal. For more information, see the


man page (

% man -M

/Library/Filesystems/Xsan/man/ 4 cvfs_config

) or “Xsan Configuration Files” on

page 122.


Chapter 4

Managing SAN Storage

background image

Chapter 4

Managing SAN Storage