Repairing the hard disk is possible, but not recommended. No repair will make the hard disk in perfect condition, so it is not safe to store data on it. Even the manufacturers, when they receive damaged hard drives to exchange, within the factory warranty, do not repair them, they just send another new hard drive. The best thing to do is to recover the data and migrate the information to a new hard drive. The cost may be higher, but the warranty and security are incomparably better.