I'm thinking about getting a Drobo S to add some storage on a Windows Server 2008 R2 box. The Drobo offers thin provisioning.
While I will only have 4.5TB of space initially, I'd like to use thin provisioning to create a 16TB LUN.
If the OS sees this as 16TB even though there is only 4.5TB available, what happens when I run out of physical space? Is there some way for the Drobo to report to the OS that it is full, despite the free cluster count of the NTFS partition saying otherwise?