Apple Xsan 1.4 - Manual (Page 130)

130 Chapter 5 Managing Metadata Controllers
To upgrade controller software without interruption:
1 Switch all volumes to a standby controller.
Go to the primary controller, open Terminal, and type:
$ sudo cvadmin -e ”fail volume“
where volume is the name of an Xsan volume.
To see a list of volumes hosted by the controller, type:
$ sudo cvadmin -e 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.
Now you can upgrade the standby controller.
Monitoring Controller Status
For information about checking or reporting the status of a controller, see these topics:
 “Viewing a Controller’s CPU and Network Utilization” on page 136
 “Setting Up Status Notifications” on page 138
 “Checking the Status of File System Processes” on page 139
 “Viewing Xsan Logs” on page 139