From: vtlists@wyae.de
Date: Thu Sep 13 2007 - 04:10:52 EDT
Greetings!
> I need to find a method of securly wiping Solaris servers using
the DOD
> standard disk sanitization requirements.
If you're speaking about the Gutman rules: they are valid only and
exclusively for MFM and RLL type of hard discs only - which are out
of production since ~10 years (the last of those were the 120 *M*B
discs, IIRC).
Just wipe the discs (in this example: c0t0d0) with
dd if=/dev/zero of=/dev/rdsk/c0t0d0
resp. dd if=/dev/zero of=/dev/rdsk/c0t0d0c2
The magnetic bit space in current hard discs is small enough and
magnetic field weak enough that residuent magnetization nearly is
undetectable even after the first overwriting - especially in HD
techniques forced to using probabilistic bit determination due to the
weak/small bit fields.
If you are paranoid enough, you could repeat overwriting the disc
alternating between if=/dev/zero and if=/dev/random until your
conscience feels at peace. ;-)
Bye
Volker
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