HP StorageWorks Clustered File System 3.1.1p1 Linux Edition Upgrade Guide (February 2006)

Chapter 1: Overview 2
Back Up the Existing Cluster
Before starting the upgrade, HP strongly recommends that you back up
your existing cluster:
• Back up /var/opt/hpfs and /etc/opt/hpcfs on each server. It is important to
preserve the original cluster configuration in case you need to back
out of the upgrade. You will also need to use the backup files if you do
a fresh install of the operating system instead of an upgrade.
You will need to create separate tar files for /var/opt/hpfs and
/etc/opt/hpcfs using tar -cf to preserve the permissions on the files. Be
sure to copy the tar files to a secure location such as another server.
If you choose to perform a fresh install of the operating system, extract
the contents of the tar files to /etc/opt/hpcfs and /var/opt/hpfs before
installing HP Clustered File System 3.1.1p1.
• Back up all PSFS filesystems for disaster recovery purposes.
Upgrade Scenarios
You can use either of these methods for the upgrade:
• All at once. The cluster is stopped on all nodes and the operating
system and HP Clustered File System are upgraded. This method
requires cluster downtime for the duration of the upgrade.
• Rolling upgrade. One server is upgraded at a time and is then
returned to the cluster. This method does not require cluster
downtime.
For an “all at once” upgrade, see Chapter 2.
For a rolling upgrade, see Chapter 3.