Caveat that you probably already know but others reading may not: 'zfs send' while absolutely awesome when used for things it's designed for will stream the fil

Caveat that you probably already know but others reading may not: 'zfs send' while absolutely awesome when used for things it's designed for will stream the file system byte for byte so if there's corruption brewing you will absolutely transfer the corruption along with everything else. (taking a snapshot, mounting the snapshot, and then backing up from -that- via something 'cp -a' like is probably the safest option, IMO, though it's always possible I've missed something here in which case I hope somebody will reply correcting me)