athlesi7 wrote:
so you think i should install the F/W or changing the heads?
Do not change the heads yourself. Do get a proper diagnosis.
A professional DR service can confidently diagnose and save your data. Seems like you have weak and failing recording heads, and prolonged usage or repeated recovery attempts will render the heads dead and this will make for a more complex and expensive recovery.
If data is not important, you can try making a clone of the device, but without knowing the extent of the failure this could also kill the disk.