Solve : hard disc drive recovery?

1.	Solve : hard disc drive recovery?
Answer» hello. i am currently doing some study on p.c repair. I am trying to FIND out what PATTERN testing is/does on hard drives. i have had a LOOK on loads of web sites ,but cannot get anything definitive. i know its not a POST about having a computer problem. i was unsure were to post it. Thanks ajb.

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