When in doubt...
count=0
while [ $count < 10 ]; do
dd if=/dev/random of=/dev/hda
count=`expr $count + 1`
done;
# Take that, NSA!
Aaron J.
Brian Daniels wrote:
On Wed, Jun 09, 2004 at 01:40:35PM -0400, Ben Pitzer wrote:
Not exactly. Bits can still be picked up from various inodes,
unfortunately, often enough to piece together an entire file. Basically,
the process you describe would have to be done about 6 or 7 times to have
serious efficacy.
By what? You have written zeros to the whole disc surface (omitting
bad/spare block regions, head/track alignment issues, etc). If you read
from that sector the drive is going to give you a zero. We're not talking
about writing within the context of a filesystem, we're just scribbling
across the whole user-accessible surface. There won't be an inode
structure left to recover bits from.
Again, this is assuming the normal drive electronics. If someone attaches
a spectrum analyzer to the drive heads then they can look for data
directly. But this is not likely to be a problem unless your drives are
known to contain very interesting/valuable data that would make them worth
the effort.
--Brian
--
Question with boldness even the existence of a god;
because if there be one he must approve of the
homage of reason more than that of blindfolded fear.
--Thomas Jefferson, Aug. 10, 1787
Brian Daniels [EMAIL PROTECTED]
http://www.eviloverlord.net
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