Whole Disk Compression-Defrag Using ZSTD Compression Levels?

[PhysicistSarah]

I'm trying to defrag my whole disk using the new compression levels.

I'm running kernel 5.1 which supports this.

If I try and run

sudo btrfs filesystem defragment -vr -czstd:15 ConvergentRefuge/Convergent\ Refuge/

from the top level directory for this hard drive, I get this error:

ERROR: unknown compression type zstd:15

Do I need to edit my fstab for this drive and reboot with the appropriate ZSTD compression option and then it will apply the level 15 when I reboot? I mostly use this disk for storing things like movies, that's why I want to compress it this much BTW.

[oshunluvr]

I have no clue as to why you're getting that error.

As far as how the compression works, rebooting isn't necessary but re-mounting is. I assume you're running defrag so all the files are processed with zstd?

[oshunluvr]

I would just remount using zstd and run defrag with a straight -c option.