Apple Xsan 1.0 - Manual (Page 16)

16 Chapter 1 Overview of Xsan
Expanding Storage
You can add free space to an Xsan volume without interrupting the users or
applications that rely on the volume for access to files. There are two ways to add
storage to a volume:
• Add Xserve RAID systems (new LUNs) to existing storage pools
• Add entire new storage pools to volumes
The first method requires you to unmount and remount the volume on clients. The
second method lets you add space without users noticing any change other than the
availability of more space in the volumes they use.
You can also add new volumes to a SAN at any time.
For information on expanding Xsan storage, see “Adding Storage” on page 42.
Xsan Capacities
The following table lists limits and capacities for Xsan volumes.
Parameter Maximum
Number of computers in a SAN (controllers and clients) 64
Number of storage pools in a volume 512
Number of LUNs in a storage pool 32
Number of LUNs in a volume 512
Number of files in a volume 4,294,967,296
Volume size 16 TB
File size 16 TB
Volume name length 70 characters
File or folder name length 251 characters
SAN name length 255 characters
Storage pool name length 255 characters
LL0192.book Page 16 Thursday, July 29, 2004 5:20 PM