You can reclaim previously allocated but unused disk space from your virtual disks by returning unused SAUs to the disk pool.

In order to reclaim space, files must be permanently deleted from disk. Space can only be reclaimed on a per-SAU base, meaning that the entire SAU must be empty and zeroed before it can be returned. If a single byte is in use on a SAU, the entire SAU cannot be returned.

Space reclamation can be done on any type of virtual disk, but depending on the type, there are some factors to account for. In case of a mirrored or dual virtual disk, the disk cannot be in recovery mode and its sync should be "up to date".

Running reclamation simultaneously is possible i  ...