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You can also try:<br>
<br>
dd if=/dev/urandom of=/dev/hda<br>
<br>
and let it run until the end of the disk is reached. It may take a few
hours. Once it completes, repeat it again as many times as you feel you
want to.<br>
<br>
You could also alternate to <br>
<br>
dd if=/dev/zero of=/dev/hda<br>
<br>
This will do a zero fill.<br>
<br>
I would personally recommend 3 to 7 wipes with random stuff as I have
used and tested (tried to recover data) using this method and was
pleased with the results under the exact same cirumstances (handing
corporate laptops to ex-staff as leaving presents!).<br>
<br>
Can see any problem with either of these commands doing exactly what
you want. But it's real late at night, so include in there the usual
disclaimer... RTFM, ensure /dev/hda IS the drive you want to wipe etc.
etc.<br>
<br>
I suspect you would need root access for this kind of operation too,
though I doubt you would be doing it as anything else.<br>
<br>
- Jonathan.<br>
<br>
Chris Watt wrote:
<blockquote
cite="mid51e0084b0511120719h5e3a1677lef8261bb074a27dc@mail.gmail.com"
type="cite">
<pre wrap="">Mainly its just clients who are paranoid about bank details etc.
Mainly WinXP machines too, any Windows programs that will replace the
entire drive with blank data. Several times? :P
~Chris
On 11/12/05, Tomasz Grzegurzko <a class="moz-txt-link-rfc2396E" href="mailto:tomasz_g@arach.net.au"><tomasz_g@arach.net.au></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">cat /dev/random > /dev/hda
Seems like a good way. But I think the general idea is to overwrite with
something (or crap in this case) and that is usually enough for everyone
but the NSA =)
Tomasz
Chris Watt wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Hi Guys,
Just curious if there is any way to seriously wipe a HDD beyond the
point of retreival by anyone? As far as I'm aware it isn't possible
without the pysical destruction of the drive. If someone knows of
something though?
~Chris
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</pre>
</blockquote>
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</pre>
</blockquote>
<br>
<br>
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Jonathan Young<br>
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