On 2018/9/5 上午4:37, Chris Murphy wrote: > 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.
Doesn't simple "cp -r" work here? (If the important thing is data, not the subvolume layout). Thanks, Qu > > 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. > >
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