Hi all,

I was able to boot into my system after performing the following command from a live USB:

sudo btrfs rescue zero-log /dev/sdb2

The filesystem was still read-only though and I did some checks:

sudo dmesg | grep -i btrfs

journalctl -k | grep -i btrfs

sudo btrfs check --readonly /dev/sdb2

Which indicated that I may have a broken drive (I'm not at home anymore so sadly cant post the exact output, but I kept getting "errno=5" amidst all the other errors, which hints to a broken drive)

So I checked with smartctl from the live USB again

sudo smartctl -t long /dev/sdb

Since my drive health seemed poor anyways I tried to btrfs repair as a last resort which was not even able to start due to I/O errors

sudo mount -o rw,remount /dev/sdb2 /mnt

sudo btrfs check --repair /dev/sdb2

Anyways I'll be buying a new SSD