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May 12th, 2005, 06:26 PM
#11
thehorse13
if you write 0 to the whole HD ... what can NSA do to recover data?
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May 12th, 2005, 07:17 PM
#12
Originally posted here by unhappy
thehorse13
if you write 0 to the whole HD ... what can NSA do to recover data?
You're thinking very digitally, but data in fact is still stored analogly on the drive. As a head writes data to a drive it writes it in a threshold space. This space is a very small amount of the platter and can vary an even smaller distance left or right. Each time you write data, its in a slightly different spot, even in the same bit on the drive. Its in these small offsets that you can still retrieve data later on. This is why overwriting a number of times writes to more and more of these little offsets and renders the data useless.
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