On Tue, Sep 4, 2018 at 10:22 AM, Etienne Champetier <champetier.etie...@gmail.com> wrote:
> Do you have a procedure to copy all subvolumes & skip error ? (I have > ~200 snapshots) If they're already read-only snapshots, then script an iteration of btrfs send receive to a new volume. Btrfs seed-sprout would be ideal, however in this case I don't think can help because a.) it's temporarily one file system, which could mean the corruption is inherited; and b.) I'm not sure it's multiple device aware, so either the btrfs-tune -S1 might fail on 2+ device Btrfs volumes, or possibly it insists on a two device sprout in order to replicate a two device seed. If they're not already read-only, it's tricky because it sounds like mounting rw is possibly risky, and taking read only snapshots might fail anyway. There is no way to make read only snapshots unless the volume can be written to; and no way to force a rw subvolume to be treated as if it were read only even if the volume is mounted read only. And it takes a read only subvolume for send to work. -- Chris Murphy
