I also keep a clean copy of an installed debian install snapshot on my NAS so i can just send it to new machines rather than run through the whole setup. works great.
Oh you are talking about ZFS, aren't you. ;)
Playing the "who came up with it first" game doesn't particularly interest me. Again, it feels like a spirit of competition when to me, that seems like a bad spirit: we should be cooperative & boosting each other. We're both open source, we're both trying to make civilization possible & to share greatnesses.
[1] http://0pointer.net/blog/revisiting-how-we-put-together-linu...
Is that why you sound like a sour apple?
No just two Gnu/Linux distributions:
openSUSE/SLES and Fedora
And SUSE (SLES) tells you (strong recommendation) to use btrfs just for the OS (for data XFS, just like RHEL) and just in a mirror configuration.
Look i work since ~forever with SLES, and if you operate it in mirror mode (just os), don't touch it and just make snapshots i never had problems. But i HAD complete data-loss with btrf many times when i did for example a defrag and re-compress, those are native btrfs-tools, and that is not acceptable to me. The Filesystems is THE place in a OS where errors like that are not acceptable (to me).