Apple Xsan 1.4 - Manual (Page 97)

Chapter 3 Managing SAN Storage 97
5 Mount the volume on clients.
Select the volume and click Clients. Select clients and click Mount.
Setting the Block Allocation Size
The default file system block allocation size (4 KB) is adequate for most volumes.
However, you can adjust this value along with the stripe breadth of the volume’s
storage pools to tune performance for special applications. For help choosing a block
allocation size, see “Choosing Block Allocation Size for a Volume,” below.
To set the block allocation size:
1 In Xsan Admin, select the volume in the SAN Components list, click Clients, and
unmount the volume from all clients and controllers.
2 Click Stop Volume.
Important: If you forget to unmount the volume (in step 1) before you stop it, be sure
to click Disconnect in the “server no longer available” alert that appears on any
computer that has the volume mounted.
3 Select the SAN, click Setup, and then click Storage.
4 Double-click the volume in the list.
5 Use the up and down arrows to choose a new value for Block Allocation Size.
6 Click OK, and then click Save.
Warning: When you change a volume’s block allocation size, all data on the volume
is lost.