i don't know exectly how to describe my hard disk problem...
it started after i use "Extended Fdisk" to delete the c partition.
when i rebooted the computer the motherboard beeps and then shutdown.
i disconnected the hard disk from the motherboard and i felt that when i put him on my hand (connected to motherboard and power)he is unstable like a magnet that don't know which direction to go ,despite it is far enough from any metal .
does someone know what is the problem?

Caused by the spinning platters. Elementary physics.
Nothing to do with magnetism.

Dobre

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It's the disk spinning, nothing else. But the fact it is spinning doesn't mean it is working properly or detected.