I followed the steps above in order to upgrade to 4493 update 5. It failed sofar.
I have a HP Microserver 56L. Everything looked ok, because the system came back online but then it gave an error. All the disks were unmounted.
But I could access the files by using file station.
I reboted the system because of the unmounted error and the problem became worse. I can't access the disks anymore. I don't see them in my file station.
So I created a task to reboot the system and after that I shutdown the Microserver. It came back online, but still no disks.
I'm at work at the moment, but I'm gonna try a complete shutdown when I'm home. Unplug the power cord and start it up again.
Hopefully that will work.