Damaged SD card (badly unmounted?) How to fix?
It looks like the card has been damaged due to premature removal. The messages indicate either a controller failure in the card or bad blocks. The latter may be recoverable. Try this to recover:
- Insert card
- Unmount it with
umount /dev/mmc0(or with whatever the drive is mounted as) fsck -v /dev/mmc0- mount it
If this doesn't help, you have to reformat with mkfs.
If the card is still unusable, the controller has probably been damaged in hardware beyond recovery.