Apple Xsan 2 (Second Edition) - Manual (Page 7)

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Step 1: Back up your SAN volumes
Before you begin, you should make a backup copy of the files on your SAN volumes.
Step 2: Unmount and stop volumes
Before you can upgrade your SAN controllers and clients, you must unmount and stop
all existing SAN volumes.
To unmount and stop volumes:
1 Open your current version of Xsan Admin.
2 In Xsan Admin, unmount SAN volumes from all clients and controllers.
3 Stop all volumes.
4 Quit Xsan Admin.
Step 3: Verify volume integrity
It is important to verify the integrity of each volume’s file-system data structures and
repair them if necessary before proceeding with the upgrade. You can use the
cvfsck
utility (in /Library/Filesystems/Xsan/bin/) to do both.
To check and repair a SAN volume:
1 Open Terminal (in /Applications/Utilities/).
2 Run the cvfsck command-line utility to replay any events recorded in the file-system
journal:
$ sudo cvfsck -j volume
3 Check the volume to see if repairs are required:
$ sudo cvfsck -vn volume
4 If the report generated in the previous step lists problems, enter the following
command to repair the volume:
$ sudo cvfsck -vw volume
5 Repeat steps 2 through 4 for each of your SAN volumes.
For more information about the cvfsck command, see the cvfsck man page.
Step 4: Update SAN computers to Xsan 1.4.2
Before you can upgrade your SAN controllers and clients to Xsan 2, they must be
running Xsan 1.4.2. If you’re already running Xsan 1.4.2, skip to Step 5.
To update to Xsan 1.4.2:
m If your SAN computers are running Xsan 1.4 or 1.4.1, choose Software Update from the
Apple menu on each SAN computer and install the Xsan 1.4.2 update. If you’re using a
version earlier than Xsan 1.4, see the Xsan Migration Guide, available at www.apple.com/
server/documentation, for help upgrading to Xsan 1.4, and then continue with this
step.