Google the subject and you'll find out how. The FBI does it every day.

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"jrb1164" <jimburmeister@msn.com> wrote in message
news:59620E54-16E6-495E-8394-4464D3F07259@microsoft.com...
>
> If every bit on the drive has been written to zero's! How is any data
> recoverable?
> Please explain to me. Maybe I missed something.
>
>
> "Wonderman" <nospamidainc@cox.net> wrote in message
> news:uGTHdBGDIHA.5208@TK2MSFTNGP04.phx.gbl...
>> Can anyone comment on whether the software from a drive mfgr. that writes
>> zeros to the drive is sufficient and secure when transfering the drive ?
>> TIA.
>
>