I have been reading the "btrfs/ZFS, sans raid and bitrot" thread and a number of thoughts and questions spring to mind. I get the impression that some are looking for a single reliable storage solution to avoid having to do backups. Surely this is impossible, I certainly would ______NEVER______ (excuse the shouting) ever trust my life to a single system if at all possible. When one is doing instrument flying training as a pilot you are constantly told never to rely on a single instrument but scan all of them and come up with an overall coherent picture. If one relies in such circumstances on a single point of failure you __will__ kill yourself. One is told raid or any such thing is a reliabilty strategy __not__ a backup strategy. I personally keep all data I consider important on four separate systems/devices one device (which is in fact duplicate items but differing technolgies) being kept off site. Maintaining this is a bit of a pain but there is no other way as far as I can see. The reason for the number of separate backups is we had in one instance in a large commercial situation managed to destroy two backs trying to restore a system. We only succeeded in the end becuase I had independantly duplicated one of the backups on another system. Lindsay