Hi,

Roman Mamedov <rm@romanrm.net> writes:

> On Fri, 24 Apr 2026 10:23:00 +0200
> Ulli Horlacher <framstag@rus.uni-stuttgart.de> wrote:
>
>> root@moep:~# btrfs filesystem df /home
>> Data, single: total=95.01GiB, used=54.27GiB
>> System, single: total=32.00MiB, used=16.00KiB
>> Metadata, single: total=1.00GiB, used=293.70MiB
>> GlobalReserve, single: total=80.53MiB, used=0.00B
>> 
>> (How) can I convert /home to DUP for System and Metadata?
>> (/ looks good)
>> 
>
> See https://btrfs.readthedocs.io/en/latest/Balance.html
>
>   btrfs balance start -mprofiles=single -mconvert=dup /home

FYI, I just tried this with linux-6.12.57, btrfs-progs_6.17.1 and it
corrupted my filesystem.  Luckily I only lose this morning's and
afternoon's work...

I am happy to provide post-mortem debugging info.

Regards,
Nicholas