Apple Xsan 1.1 - Manual (Page 18)

18 Chapter 3 Upgrading to Xsan 1.1 on Mac OS X v10.4 “Tiger”
The following steps summarize how to move from Xsan 1.0 on Mac OS X v10.3 to
Xsan 1.1 on Mac OS X v10.4:
1 Unmount volumes from controllers.
2 Upgrade all controllers to Mac OS X v10.3.9.
3 Upgrade all controllers to Xsan 1.1 on Mac OS X v10.3.9.
4 Upgrade standby controllers to Mac OS X v10.4.1 or later and Xsan 1.1.
5 Upgrade the primary controller to Mac OS X v10.4.1 or later and Xsan 1.1.
6 Upgrade the Xsan Admin application on any other administrator computers.
7 (Optional) Fail over to the original primary controller.
8 (Optional) Upgrade client computers.
9 (Optional) Remount volumes on controllers.
Warning: Do not make any changes to Xsan settings (using either Xsan Admin or the
command-line tools) while you are upgrading your SAN controllers. If you need to
make configuration changes, wait until you finish upgrading all of your controllers.