My Buffalo HD which is actually a WD 500GB Hard drive. I opend it up and connected via SATA adapter but still the problem persists. I checked the drivers. Looked for clicking noise as in dead hard drive but none of those problems seems to be there. Also I tried formatting it but was unable to do so. Can anyone tell me whats the cause? It still may be the head problem but its not clicking as a dead hard drive does. It also seems to be spinning just fine but can't get to the root of the problem. Does anyone knows whats the problem?