Apple Xsan 1.1 - Manual (Page 12)

12 Chapter 2 Upgrading to Xsan 1.1 on Mac OS X v10.3.9 “Panther”
Step 1: Upgrade SAN controllers to Mac OS X v10.3.9
Xsan 1.1 requires Mac OS X or Mac OS X Server version 10.3.9. If your SAN controllers are
running earlier versions of Mac OS X, you must upgrade them to version 10.3.9 before
you upgrade Xsan.
Important: If you want your SAN volumes to be available to clients during the upgrade,
upgrade your SAN controllers one at a time so there is always a standby controller
ready to take control of any volume currently hosted by the controller you are
upgrading.
Note: If you want, you can use the cvadmin fail command to force failover and then
verify that it was successful before you upgrade a controller (instead of relying on
failover to take place behind the scenes when you restart the computer). For more
information, see the
cvadmin man page.
To upgrade your controllers to Mac OS X v10.3.9:
1 Run the update installer on a controller computer.
If the computer is connected to the Internet, you can open the Software Update pane
of System Preferences, click Check Now, select the Mac OS X Update Combined version
10.3.9 update, and click Install.
If the controller is on a private network, you can use a computer that is connected to
the Internet to download the update from www.apple.com/support/downloads,
transfer the installer to the controller computer, and run it.
2 Restart the controller computer when prompted.
3 Repeat steps 1 and 2 for each controller in your SAN.