7 Dec
2004
7 Dec
'04
06:30
On Monday 06 December 2004 17:11, James Knott wrote:
However, each time you overwrite, the orginal data gets pushed further down into the noise, making it more difficult to read. Eventually, a point will be reached, when it's impossible to tell the original data, from the noise. There is IIRC, a specified number of overwrites, with different patterns, so that the disk is considered fully erased.
There have been articles written about this. It seems you can never completely delete data stored on hard drives, they claim it is always possible to recover it using magnetic inference analysis of the drive, so if you're truly paranoid/security conscious you'll shred the drive totally