so for years now I've been using btrfs without any issues, up until recently when I noticed all of my new files seem to have a C attributes, there is some that do not, I've been unable to figure out what causes file attribute to have C

under my understanding, if I run:

chattr -C file

it should remove the C attribute, but not even with sudo that command seems to do anything, altho I can add/remove other attributes, just not C.

I assumed it could be to fstab but seems to be good, i even added datacow at the end

UUID=ed0d0921-a6cd-48c0-ab59-27b7b7e8bdd2 /home/jawz/Misc/HD btrfs defaults,noatime,space_cache=v2,commit=120,compress=zstd,datacow 0 0

Is there any way that I can fix my filesystem so the files can be copy on write again?

CodePudding user response：

According to the btrfs wiki FAQ:

... the COW status can be modified only for empty or newly created files.

If you really need to change the COW status, I suppose you will need to copy your current files to new files.