fstab from sda2?
Are you sure sda2 is the correct partition?
Yes.
wait. i am mate this with dolphin. lsblk -l yes is sda2
Then can you share ls /mnt/arch_btrfs
the folder of /mnt/arch_btrfs is empty?
Then you have the wrong thing mounted at /mnt
why?
Because if you had the correct thing mounted there. It wouldn’t contain nothing except a single empty directory.
and now? what can i do?
Can you share lsblk -f
Try this:
cd
sudo umount /mnt
sudo mount /dev/sda2 /mnt -o subvol=@
sudo mount /dev/sda4 /mnt/efi
Now this:
pacman -Rc mkinitcpio
pacman -S kernel-install-for-dracut
reinstall-kernels
okay. its done!
Yes, see if all is working.