I added a new disk to DPM, and as usual formatted it, labeled it and tried to add the disk as storage pool. Whoa! 0kb remaining. Where did the space go?
1) Microsoft DPM 2012 R2, expects its storage to be kept away from prying eyes. I.e. No explorer interface.
2) Go to disk management, delete the volume.
3) Run “Add” disk and you will start seeing the newly added disk in your DPM console.