https://bbs.archlinux.org – I use BTRFS on RAID to protect against drive failures, and snapper [1,2] for timelined backups protecting against human failures and/or bogus system updates.Additionaly I copy critical data to external drives from time to time to protect against filesystem failures (which is good to have until BTRFS has a reliably working fsck tool) teekay https://bbs.archlinux.org/profile.php?id=53621 (HowTos)