ZFS and Btrfs both are very good these days?
Can linux mount the Haiku version of BFS? Seem to recall that this was an issue the first few times I tried Haiku and it was buggy and unreliable but don't quite remember or recall trying it since. Searches are not pulling up anything useful. If not is this something Haiku is planing to work on or are you just going to let linux take care of that when ever they get around too it?