On Sat, Aug 01, 2015 at 10:09:35PM +0200, Hendrik Friedel wrote: > Hello, > > I converted an array to raid5 by > btrfs device add /dev/sdd /mnt/new_storage > btrfs device add /dev/sdc /mnt/new_storage > btrfs balance start -dconvert=raid5 -mconvert=raid5 /mnt/new_storage/ > > The Balance went through. But now: > Label: none uuid: a8af3832-48c7-4568-861f-e80380dd7e0b > Total devices 3 FS bytes used 5.28TiB > devid 1 size 2.73TiB used 2.57TiB path /dev/sde > devid 2 size 2.73TiB used 2.73TiB path /dev/sdc > devid 3 size 2.73TiB used 2.73TiB path /dev/sdd > btrfs-progs v4.1.1 > > Already the 2.57TiB is a bit surprising: > root@homeserver:/mnt# btrfs fi df /mnt/new_storage/ > Data, single: total=2.55TiB, used=2.55TiB > Data, RAID5: total=2.73TiB, used=2.72TiB > System, RAID5: total=32.00MiB, used=736.00KiB > Metadata, RAID1: total=6.00GiB, used=5.33GiB > Metadata, RAID5: total=3.00GiB, used=2.99GiB
Looking at the btrfs fi show output, you've probably run out of space during the conversion, probably due to an uneven distribution of the original "single" chunks. I think I would suggest balancing the single chunks, and trying the conversion (of the unconverted parts) again: # btrfs balance start -dprofiles=single -mprofile=raid1 /mnt/new_storage/ # btrfs balance start -dconvert=raid5,soft -mconvert=raid5,soft /mnt/new_storage/ You may have to do this more than once. Hugo. > Why is there Data single and Raid? > Why is Metadata RAID1 and Raid5? > > A scrub is currently running and showed no errors yet. -- Hugo Mills | You've read the project plan. Forget that. We're hugo@... carfax.org.uk | going to Do Stuff and Have Fun doing it. http://carfax.org.uk/ | PGP: E2AB1DE4 | Jeremy Frey
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