American Megatrends StorTrends 2401 Setup Manual page 36

If you select Exact, the volume size cannot exceed the actual physical space available in
the storage device.
If you select Auto, the volume size will automatically expand if used disk space begins to
reach the maximum allocated size.
It is recommended to leave 20% of the physical space free for snapshots.
Only 1022 snapshots are supported on the following StorTrends 2401 storage
appliances:
•
StorTrends 2401i
36
NOTE:
StorTrends® 2401 Setup Guide