On Fri, May 12, 2017 at 12:22:00AM +0500, Roman Mamedov wrote: > On Thu, 11 May 2017 09:19:28 -0600 > Chris Murphy <li...@colorremedies.com> wrote: > > > On Thu, May 11, 2017 at 8:56 AM, Marat Khalili <m...@rqc.ru> wrote: > > > Sorry if question sounds unorthodox, Is there some simple way to read (and > > > backup) all BTRFS metadata from volume? > > > > btrfs-image > > Hm, I thought that's for debugging only, and that you can't actually restore > metadata onto a data-containing FS and have anything mountable/readable as a > result.
Indeed. This has been tried before, and I don't think it came to anything. > Seems not to be the case, and in fact, could this be one of the "missing > links" in the Fsck story, > > -w > Walk all the trees manually and copy any blocks that are > referenced. Use this option if your extent tree is corrupted to > make sure that all of the metadata is captured. > > This certainly does sound like something to try for some of those broken > filesystems where Btrfsck refuses to do anything. Save image with this manual > walking/reconstruction of the trees, then restore. Too bad I already nuked > mine, so can't experiment with that. I suspect it's still only capturing metadata, rather than data. Hugo. -- Hugo Mills | Would you like an ocelot with that non-sequitur? hugo@... carfax.org.uk | http://carfax.org.uk/ | PGP: E2AB1DE4 |
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