What I wrote is based on firsthand experience in a clean room, where we used to exchange disk platters in an effort to recover data.

While I did indeed find many drives with mechanical/electrical failures, I found many more at that time that were wrecked due to viruses like the older "Korean" varieties that merely wipe out Track Zero and things like that, which to the user would likely get blamed on something else due to the way the drive acts. There also exist bad codes that will crash heads. That one looks like a hardware fault to the uninitiated. Be careful with your disk swap cure because many are trojan-like and will be lurking to trash the replacement drive's data at a later time, too. -- Which leads to users hating one brand of disk, of course. They can indeed write code that can trash hardware.


--Mac