I think I solved the problem: I checked the partition /dev/sdd1 and found that it was damaged and could not be restored. I formatted the partition /dev/sdd1 again. And now it seems working again.
I think I solved the problem: I checked the partition /dev/sdd1 and found that it was damaged and could not be restored. I formatted the partition /dev/sdd1 again. And now it seems working again.