Linux bootup ERROR:fsck.ext3:Bad magic number in super-block while trying to open /dev/sde1

Below is the step to resolve the error "Linux bootup ERROR:fsck.ext3:Bad magic number in super-block while trying to open /dev/sde1"
 

• While trying to modify/remove entry from /etc/fstab it is not allowing by telling it is read only so follow the steps to first mount it in RW mode
• If the correct root filesystem is already mounted, but just as read-only you can remount it read-write with

            mount -o remount,rw /

           then try to modify the /etc/fstab file