I would like to be able to name a few remotes that must retain *all* annexed files. `git-annex fsck` should warn me if any files are missing from those remotes, even if `annex.numcopies` has been satisfied by other remotes. I imagine this could also be useful for bup remotes, but I haven't actually looked at those yet. Based on existing output, this is what a warning message could look like: fsck FILE 3 of 3 trustworthy copies of FILE exist. FILE is, however, still missing from these required remotes: UUID -- Backup Drive 1 UUID -- Backup Drive 2 Back it up with git-annex copy. Warning What do you think?