Apple Xsan 1.0 - Manual (Page 45)

Chapter 3 Managing SAN Storage 45
Adding a Volume to a SAN
A single Xsan SAN can provide multiple shared volumes.
1 Open Xsan Admin and select the SAN in the SAN Components list.
2 Click Setup, then click Storage.
3 Click the Add Volume button next to the list.
4 In the dialog that appears, provide the following information, then click OK.
Volume Name: Type a name for the volume. Use only uppercase letters (A-Z),
lowercase letters (a-z), and numbers (0-9). Don’t include spaces, underscores (_), or
hyphens (-). Maximum length: 70 characters.
Max Log Size: Type the maximum amount of space that the log file for this volume
occupies on the controller’s startup disk.
Allocation Strategy: Choose how storage for files is allocated among the storage pools
that belong to the volume. If you choose Round Robin, each new request for space is
assigned to the next available storage pool in turn. If you choose Fill, all space is
allocated on the first storage pool until it is full, then to the second storage pool, and
so on. If you choose Balance, space is allocated on the storage pool that has the most
free space.
Block Allocation Size: If you’re not sure what value to use, use the default (4 KB) or see
“Choosing Block Allocation Size for a Volume” on page 54.
5 Select the new volume and click the Add Storage Pool button. In the dialog that
appears, provide the following information, then click OK.
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 50.
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.
6 Click Available LUNs, drag LUNs to the storage pool, and click Save.
If you haven’t initialized a array, you’ll be asked to type a label for the array.
7 Click Save.
LL0192.book Page 45 Thursday, July 29, 2004 5:20 PM