Adding a storage pool to a volume – Apple Xsan 1.1 User Manual
Page 55
Chapter 3
Managing SAN Storage
55
Adding a Storage Pool to a Volume
You can add free space to a SAN volume by adding a storage pool to the volume.
Note: A volume can’t contain more than 512 storage pools.
To add a storage pool:
1
Prepare the LUNs you’ll use to create the storage pool.
2
Open Xsan Admin, select the volume in the SAN Components list, click Clients, and
unmount the volume from all clients and controllers.
3
Stop the volume.
Important:
If you forget to unmount the volume (Step 2) before you stop it, be sure to
click Disconnect in the “server no longer available” alert that appears on the client.
4
Select the SAN in the SAN Components list, click Setup, then click Storage.
5
Select the volume you’re expanding, then click the Add Storage Pool button (next to
the list).
6
In the dialog that appears, specify:
Storage Pool Name: Type a name for the storage pool. If the OK button is disabled
when you finish typing the name, the name is reserved; try another. For a list of
reserved names, see Chapter 7.
Use for: Choose the types of data that can be stored on the storage pool.
Permissions: Choose the type of access clients have to this storage pool.
Stripe Breadth: Specify how much data is written to or read from each LUN in the
storage pool before moving to the next LUN. This value can affect performance. If
you’re not sure what value to use, use the default (64 blocks) or see “Choosing Stripe
Breadth for a Storage Pool” on page 62.
Multipath Method: Choose Rotate to have Xsan alternate between the connections
for maximum throughput. Choose Static to have Xsan assign each LUN in the storage
pool alternately to one of the connections when the volume is mounted.
7
Click OK.
8
Click Available LUNs, drag LUNs to the storage pool, and click Save.
9
Start the volume.
10
Select the volume in the SAN Components list, click Clients, and remount the volume
on each client that had it mounted.
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
cvfs_config