Hi
WD10JMVW dropped causing damage to one of the four heads and not allowing the drive to initialise. Performed a head swap with donar and now drive is detected and partition info is available as are directory structures. Problem is most of the data seems to be on unreadable sectors.

Is this a sign of incompatible donar heads or a case that one of the platters that is not so visible has sustained damage from the failed head?

Thanks in advance for any pointers.