Upgrade VDP 5.8 to 6.0 - and do you actually need to upgrade from vSphere 5.5 to 6.0 to take advantage?

I did just follow the documentation on the Vmware website here
 http://pubs.vmware.com/vsphere-60/topic/com.vmware.ICbase/PDF/vmware-data-protection-administration-guide-60.pdf

Importantly, I upgraded a VDP on 5.8 upto 6.0 still within a vSphere 5.5 environment as I wanted to take advantage of a VDP in 6.0 (free - or included with your licensing) having the larger capacity compared to the VDP in 5.8.  The capacity that was previously only on Advanced is now standard in 6.0 - 8TB of deduping storage for backups!

Do this when you are not going to run backups and you have plenty of time before backups start running.

The summary of the upgrade was as follows:-

1. Download ISO.
2. Shutdown the VDP appliance (nicely - use vmware tools, guest os shutdown)
3. Edit settings - got to each virtual disk except for disk 1, and make them all dependent disks and snapshottable.
4. Snapshot the VDP appliance.
5. Power up the VM.
6. Wait for the blue instruction screen (web management advice)
7. Attach the ISO
8. Wait (apparently according to the instructions the appliance can take a while - I happened to received a phone call at this point so I don't know)
9. Go to https://<IP ADDRESS OF VDP APPLIANCE:8543/vdp-configure/
10. On the config tab, make sure all services are running
11. Go to the upgrade tab
12. Upgrade - this can take a while - I mean, an hour or so.
13. After it finishes, it will power down the VDP appliance.
14. Edit settings, make all the disks independent (except disk 1) and not susceptible to snapshots
15. Power on.
16. This bit can take sometime too - you have just performed a large upgrade you know!

That's it!

The backups continued working and we have been able to restore data.