Backup server upgradation

Hi All,

I have a Backup server with NetWorker 7.5.2.Build.452 Enterprise Edition.

I,m planning on upgrading my  NW 7.5.2 server OS Hp-UX B.11.23 U ia64 to

NW 7.6.2.

We will take a backup of /nsr, just to be sure.

What procedure need to folow for that?

Thanks,

Lax