[mdlug] Fw: Re: Erase hard drive

[R. Kannan]

-----Forwarded Message-----
>From: "R. Kannan" <rkannan at peoplepc.com>
>Sent: Sep 15, 2007 7:34 PM
>To: Jeff Hanson <jhansonxi at gmail.com>
>Subject: Re: [mdlug] Erase hard drive
>
>
>
>-----Original Message-----
>>From: Jeff Hanson <jhansonxi at gmail.com>
>>Sent: Sep 15, 2007 6:24 PM
>>To: "R. Kannan" <rkannan at peoplepc.com>, MDLUG's Main discussion list <mdlug at mdlug.org>
>>Subject: Re: [mdlug] Erase hard drive
>>
>>On 9/15/07, R. Kannan <rkannan at peoplepc.com> wrote:
>>> I was looking at this article
>>>
>>> http://www.redhat.com/magazine/026dec06/features/tips_tricks/
>>>
>>> and it says that there are 'newer, more advanced, techniques make it possible
>>> to retrieve data that was replaced with a bunch of 0'" after issuing the
>>> command
>>>
>>> dd if=dev/zero of=/dev/sdb
>>>
>>> How is it possible to 'read' data that has been replaced with zeroes??
>>>
>>> Raj
>>
>>http://free-backup.info/physical-data-recovery.html
>>
>>Deletion is a basic level of erasure.  Overwriting is better.  Thermite is best.
>
>
>Doesn't the 'dd' command overwrite the data with zeroes? It does not simply delete the files, partitions etc. BTW, even the boot sector gets overwritten with zeroes.
>
>
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