Apple Xsan 1.1 - Manual (Page 19)

Chapter 3 Upgrading to Xsan 1.1 on Mac OS X v10.4 “Tiger” 19
Step 1: Unmount volumes from all controllers
To avoid difficulties mounting volumes on controllers after upgrading, unmount Xsan
volumes from the controllers before you upgrade.
Note: Unmounting volumes from the controllers does not affect availability for clients.
To unmount a volume:
m In Xsan Admin, select the volume in the SAN Components list and click Clients. Then
select a controller and click Unmount.
Step 2: Upgrade all controllers to Mac OS X v10.3.9
Because Xsan 1.0 controllers can’t switch control of volumes directly to Xsan 1.1
controllers that are running Mac OS X v10.4, you must first upgrade your controllers to
Xsan 1.1 on Mac OS X v10.3.9 so that failover can take place and your volumes will be
available during the upgrade.
Note: If your volumes don’t need to be available during the upgrade, you don’t have to
ensure failover compatibility and can skip to “Upgrade standby controllers to Mac OS X
v10.4.1 and Xsan 1.1” on page 21.
Important: If you want your SAN volumes to be available to clients during the upgrade,
upgrade your 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.
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.