# sudo btrfs fi df /mnt/disk3
Data, single: total=12.70TiB, used=12.27TiB
System, DUP: total=8.00MiB, used=1.34MiB
Metadata, DUP: total=15.00GiB, used=14.50GiB
GlobalReserve, single: total=512.00MiB, used=608.00KiB
# mkdir /mnt/disk3/tst
mkdir: cannot create directory ‘tst’: No space left on device
I suspect this is BTRFS balancing issue, but even BTRFS’s own utility is indicating there’s still SOME space left. Certainly should be enough to create a directory.
Any ideas?
Just in general BTRFS default options for creating new volumes seem to not work well for disks that I intend to fill completely immediately after formatting. Are there better options for this use case? I just use
mkfs.btrfs /dev/sdd1
Would be nice if there’s some automatic solution, but after running into this issue I always run a couple different btrfs balance after deleting larger files for good measure. Took a while to figure out why Linux said there wasn’t any space left when df reported several GB available on the root partition
I am surprised there isn’t an automatic mechanism to handle this especially if it is such a frequent issue.