I experimented with RAID5, but now I want to get rid of it:
$ sudo btrfs balance start -dconvert=raid1,soft -v /
Dumping filters: flags 0x1, state 0x0, force is off
DATA (flags 0x300): converting, target=16, soft is on
ERROR: error during balancing '/' - No space left on device
There may be more info in syslog - try dmesg | tail
This is in dmesg:
[ 166.799139] btrfs: relocating block group 13368320589824 flags 129
[ 248.927524] btrfs: relocating block group 13338255818752 flags 129
...
[ 409.184588] btrfs: relocating block group 11607454253056 flags 129
[ 410.528075] btrfs: relocating block group 11605306769408 flags 129
[ 411.957809] btrfs: 62 enospc errors during balance
Extra info:
Data, RAID1: total=3.26TiB, used=3.25TiB
Data, RAID5: total=124.00GiB, used=123.90GiB
System, RAID1: total=32.00MiB, used=508.00KiB
System, single: total=4.00MiB, used=0.00
Metadata, RAID1: total=9.00GiB, used=7.97GiB
Label: data uuid: 93be47ab-af7a-4329-8a6c-c6ff220060b0
Total devices 3 FS bytes used 3.38TiB
devid 1 size 1.82TiB used 1.22TiB path /dev/sdd
devid 2 size 3.64TiB used 2.63TiB path /dev/sdb
devid 6 size 3.64TiB used 2.87TiB path /dev/sdc
Btrfs v3.12
Linux maxi 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC
2014 x86_64 x86_64 x86_64 GNU/Linux
I tried scrub (no errors) and I cleared the free space cache. Nothing worked.
Now I'm doing full balance (without 'soft') but that will take days.
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