Re: High-sensitivity fs checker (not repairer) for btrfs

On Sat, Nov 10, 2012 at 4:32 PM, Bob Marley [off-list ref] wrote:

On 11/10/12 22:23, Hugo Mills wrote:

quoted

    The closest thing is btrfsck. That's about as picky as we've got to
date.

    What exactly is your use-case for this requirement?

We need a decently-available system. We can rollback filesystem to
last-known-good if the "test" detects an inconsistency on current btrfs
filesystem, but we need a very good test for that (i.e. if last-known-good
is actually bad we get into serious troubles).

Scrub is probably more useful as a check, combined with "does the
filesystem actually mount".

So do you think btrfsck can return a false "OK" result? can it "not-see" an
inconsistency?

No set of checks will ever be perfect, so yes.