we have previous versions enabled on our Server 2008 R2 server and it has been working since February with no problem. I allocated 50GB to it and we normally have about 2-3 weeks worth on there with a schedule of 3-4 times a day.
Recently the versions disappeared from the Tab but the drive shadow copies were still snapshotting fine.
The quick google suggested a reboot, so i scheduled that in and yes it fixed it. That was nearly 2 weeks ago and now they have disappeared again!
I wonder what's happening, can you think of anything i can check, any services i can restart?