All my servers are 6.5SP5 except one. It is on older HP Proliant Server that I use for backups. It has been years since I did the upgrade from 6.0x to 6.5 x on all my productions servers.

Is there a readme on this type of in-place upgrade, I can't even remember where to start. I see a lot on old OS before 6.0 but not anything for a in-place upgrade between a 6.0x to 6.5x.