Apple Xsan 2 (Third Edition) - Manual (Page 20)

Control user access to files and folders on a volume, by setting up access control lists Â
(ACLs) in Xsan Admin.
Set up zones in the underlying Fibre Channel network, to segregate users and
Â
volumes.
Expanding Storage
There are two ways you can add free space to an Xsan volume:
Add RAID systems (new LUNs) to existing storage pools Â
Add entire new storage pools to the volume Â
Both methods unmount and remount the volume on clients, so choose a time that’s
convenient for your SAN users.
You can also add new volumes to a SAN at any time.
For information about expanding Xsan storage, see “Adding Storage” on page 51.
Xsan Capacities
The following table lists limits and capacities for Xsan volumes.
Parameter Maximum
Number of volumes on a SAN 16
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
LUN size Limited only by the size of the RAID array
Volume size Limited only by the number and size of LUNs
File size Approximately 2 63 bytes
Volume name length 70 characters (A–Z, a–z, 0–9, and _ )
File or folder name length 251 ASCII characters
Storage pool name length 255 ASCII characters
Affinity name length 255 ASCII characters
LUN name (label or disk name) 242 ASCII characters
20 Chapter 1 Overview of Xsan