On Mon, Apr 06, 2015 at 10:40:03AM +0300, Pavel Volkov wrote: > On Sunday, April 5, 2015 1:04:17 PM MSK, Hugo Mills wrote: > > That's these, I think: > > > >#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5) > >#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6) > > > >so it's definitely -O^extref. I don't see where big_metadata comes > >from, though. That's not a -O option. Try with -O^extref and see where > >that gets you. (Also, don't mount the FS on a newer kernel -- it may > >be setting big metadata automatically, although it probably shouldn't > >do). > > By the way, is there any way to see which options are enabled on a > local filesystem without having to try mounting it with old kernel > and checking dmesg?
btrfs-show-super is the tool for that. Hugo. -- Hugo Mills | Great oxymorons of the world, no. 4: hugo@... carfax.org.uk | Future Perfect http://carfax.org.uk/ | PGP: E2AB1DE4 |
signature.asc
Description: Digital signature
