You're right about "hypertuned" We call it adaptive information that is specific to that head disk assembly.
Some newer drives such as Hitachi Travelstars have the PCB coded to the head disk assembly. If you swap it to another drive, it will not work. Worse, it won't work when you put it back to...
We have a lot of experience with it and with data recovery. Success rates can vary between hard drive manufacturers and familys of drives. If the failure is firmware, which is often the case, the chances of a recovery are good.
If the data is critical, you should stop playing around because you could cause more harm than good. DON'T try to swap the PCB. Sometimes this causes more problems as well. Ifyou really need it back, take it to a professional recovery lab. They will have tools that can properly diagnose the...
This is actually a common failure for drives. When the drive dies the BIOS won't see it. In some cases it may be recognized by the BIOS but improperly. In most cases, firmware corruption causes the issue. The only way to deal with it is to use a product like PC-3000 to diagnose it properly.
It sounds like the mechanics for the drive are worn, not broken. When the mechanics wear down, holding the drive in different positions re-aligns the mechanics and allows it to read. If you find a position that works, hold it there till you get the data off. Try not to actually shake it or you...
Sounds like a firmware corruption. When the drive's firmware does not function properly, different BIOS will see it differently.
To fix hdd firmware, you will need to check out PC-3000.
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