btrfs and system df

Hans von Stoffeln <lists@xxxxxxxxxx> · Thu, 9 Jul 2020 05:44:23 +0200

Hi,

current situation is that the linux system df thinks the drive is full:

/dev/mapper/HyVol002-hy002_data    3,0T    655G     0  100% 
/home/pyloor/data

But its not:

Overall:
    Device size:                   3.00TiB
    Device allocated:            655.07GiB
    Device unallocated:            2.36TiB
    Device missing:                  0.00B
    Used:                        654.34GiB
    Free (estimated):              2.36TiB      (min: 1.18TiB)
    Data ratio:                       1.00
    Metadata ratio:                   2.00
    Global reserve:              512.00MiB      (used: 0.00B)

Data,single: Size:653.01GiB, Used:652.74GiB (99.96%)
   /dev/mapper/HyVol002-hy002_data       653.01GiB

Metadata,DUP: Size:1.00GiB, Used:818.20MiB (79.90%)
   /dev/mapper/HyVol002-hy002_data         2.00GiB

System,DUP: Size:32.00MiB, Used:96.00KiB (0.29%)
   /dev/mapper/HyVol002-hy002_data        64.00MiB

Unallocated:
   /dev/mapper/HyVol002-hy002_data         2.36TiB

I searched for the answer in the internet and a balance was suggested. I 
did it:

btrfs fi balance start -dusage=5 .
Done, had to relocate 3 out of 659 chunks

I increment the value at usage to 95 but it says no chunks relocated.

Thanks for the help and sry for the newbie question.

Kind regards,
Holger