One of my servers has 3 drive that are all being protected by DPM. One of the drives started playing up stating that the server couldnt replicate the data. After reading around on the web I found suggections to simply remove the drive from the protection group and the add it again which I did.

Now, before I started messing I had 3TB of un allocated space left on my disks. Now after re-adding the drive I only have 1TB. This drive was being protected before so I didnt think that it would allocate a load more space but obviously it has. So in an attempt to free the space I once more removed the drive from the protection group only to find that all the space must still be allocated some how and I still only have 1 TB remaining.

How can I claim all that space back that is allocated to this drive but currently not being used?