I read through the nice PDF on snapshotting with DSS and still had a few questions.

Is it necessary to leave any free space on a volume group (single disk in my case) to allow for snapshots? Or is the snapshot space carved out of the space provided for a the share (NAS volume I believe).

I have 466GB free. I'd like to host some ESXi VMs there and I have nothing else I want to place in this location. But I also want to be able to do snapshots for backups. Should I create a NAS volume that that takes up the entire space and will snapshots come out of that, or do I need to leave some free space (10%?) and then reserve it all for snapshots?

Thanks