[TriLUG] OT: Linux Friendly Laptop Forsale
Aaron S. Joyner
aaron at joyner.ws
Wed Jun 9 18:51:19 EDT 2004
When in doubt...
while [ $count < 10 ]; do
dd if=/dev/random of=/dev/hda
count=`expr $count + 1`
# Take that, NSA!
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
>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
>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 bitmage at bellsouth.net
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