Apple Xsan 1.4 - Manual (Page 78)

78 Chapter 3 Managing SAN Storage
 Set the block allocation size (page 97)
 Set the storage allocation strategy (page 99)
 Enable or disable access control lists (page 100)
 Set the Windows ID mapping method (page 101)
 Check volume fragmentation (page 101)
 Defragment a volume (page 102)
 Check a volume (page 103)
 Repair a volume (page 104)
Adding Storage
There are several ways you can add storage to a SAN:
 Add RAID arrays (LUNs) to existing storage pools
 Add storage pools to existing volumes
 Add new volumes
The first option, adding LUNs to a storage pool, increases available storage and can
improve the performance of the SAN because it increases the number of RAID
controllers and data paths between clients and storage. You’ll need to stop the volume
and unmount it from clients before you add LUNs to any of its storage pools.
Note: You can’t add LUNs to an existing storage pool that is being used to store journal
data or metadata.
The second option, adding a storage pool to a volume, also increases available storage,
and also requires you to stop the volume and unmount it from clients.