dedicating 2nd ethernet port for backups.. how?

garyd9 wrote:
...Actually, I'm going to have to do some searches to find out if OS6 supports any type of snapshot backups at all...

If you turn on user access to the snapshots, then they will be included in the backup unless you exclude it. That's generally not a good thing, since if you copy a single snapshot you end up doubling the storage needs, and usually there are a lot of snapshots.

btrfs itself puts the unchanged files into multiple folders (e.g. the snapshots and the main share) - so each snapshot appears to be a full copy of the share. This is a bit like a link, but it doesn't show up as a link. So if you back up or copy a snapshot, you are copying the complete share as it existed when the snapshot was made - not a delta.