[SOLVED] After updating yesterday...

[Nachteule]

@ThePumisher

As rikardo1979 already said, it is very bad idea powering off rpi before shutting down.

If you really get this error message can't read superblock, you could try repair your filesystem:

1) connect usb keyboard to the Pi

2) run command btrfs rescue super-recover /dev/mmcblk0p2

3) crossing fingers that this command can find valid copy of superblock

4) run command sync

5) run command reboot -f to reboot Pi