— run to find out the hd location.
— as root
umount /dev/sda4 — change to each of your mapped entries above
fsck -NVr — for a trail run
fsck -Vr to actually fix
if you are presented with warning about unmount drive go to above and unmount.
Without specifying a partition to check all partitions in fstab are checked. Make sure they are all unmounted first. You are warned if a check on a mounted drive is going to be performed.
shutdown -r now