Re: Data single *and* raid?

[Hendrik Friedel <hendrik@friedels.name>]

Hello,

>>     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/
>>
>
> Yep I bet that's it also. btrfs fi usage might be better at exposing this case.


Thanks for your hints.
The balance is running now for about 11h:
The status is a bit surprising to me:
0 out of about 2619 chunks balanced (4165 considered), 100% left

btrfs fi usage is also surprising:
Overall:
     Device size:                   8.19TiB
     Device allocated:              2.56TiB
     Device unallocated:            5.62TiB
     Device missing:                  0.00B
     Used:                          2.56TiB
     Free (estimated):             11.65TiB      (min: 2.81TiB)
     Data ratio:                       0.48
     Metadata ratio:                   1.33
     Global reserve:              512.00MiB      (used: 0.00B)

Data,single: Size:2.55TiB, Used:2.55TiB
    /dev/sdc        1.60TiB
    /dev/sde      975.44GiB

Data,RAID5: Size:2.73TiB, Used:2.72TiB
    /dev/sdc        1.12TiB
    /dev/sdd        2.73TiB
    /dev/sde        1.61TiB

Metadata,RAID1: Size:6.00GiB, Used:5.33GiB
    /dev/sdc        5.00GiB
    /dev/sdd        1.00GiB
    /dev/sde        6.00GiB

Metadata,RAID5: Size:3.00GiB, Used:2.99GiB
    /dev/sdc        2.00GiB
    /dev/sdd        1.00GiB
    /dev/sde        3.00GiB

System,RAID5: Size:32.00MiB, Used:736.00KiB
    /dev/sdd       32.00MiB
    /dev/sde       32.00MiB

Unallocated:
    /dev/sdc        1.02MiB
    /dev/sdd        1.02MiB
    /dev/sde      164.59GiB


I hope, that is because Raid5 is not implemented yet?

Regards,
Hendrik

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