Apple Xsan 1.0 - Manual (Page 68)

68 Chapter 5 Managing Metadata Controllers
Upgrading Controller Software
If your configuration includes a standby controller, you can upgrade the Xsan software
without interrupting the SAN. Xsan controller software is always compatible with the
preceding version of the client software (controllers can be one version ahead of
clients). So, you can upgrade your controllers first and your client computers will
continue to work until it is convenient to upgrade them to the same version.
To upgrade Xsan without interruption:
1 Switch all volumes to a standby controller.
Go to the primary controller, open Terminal, and type:
$ cd /Library/Filesystems/Xsan/bin
$ sudo ./cvadmin fail volume
where volume is the name of an Xsan volume.
To see a list of volumes hosted by the controller, type:
$ sudo ./cvadmin select
To see which controller is hosting a volume:
Open Xsan Admin, select the volume, and click Overview.
2 When all volumes are being hosted by the standby controller, upgrade the software on
the primary controller.
3 When you are finished upgrading the primary controller, use the methods in step 1 to
switch control of active volumes back to the primary controller.
4 Now you can upgrade the standby controller.
Monitoring Controller Status
For information on checking or reporting the status of a controller, see these topics:
• “Viewing Controller CPU and Network Utilization Graphs” on page 71
• “Setting Up Status Notifications” on page 72
• “Checking Status of File System Processes” on page 72
• “Viewing Logs” on page 73
LL0192.book Page 68 Thursday, July 29, 2004 5:20 PM