On Friday, March 7, 2008 at 08:22:41 (-0800) Michael Perelman writes: >Bill, I don't understand. I though that the system magnetically >writes a 0 or a 1 on each location & that programs are available that >overwrite everything with 0's. Are you saying that the spot on the >drive can be a 0 with a residue of a 1?
Yes. Drives can retain a series of magnetic ghost images. The issue is then to understand how many of these will hang around, and how many times to overwrite each byte in the disk. I'd say if you rewrote each byte on the disk a dozen times (where "rewrote" means writing to the disk and "syncing" it to ensure the value you are writing actually moves from memory to the hard drive platter) with sufficiently scrambled data, you'd be hard-pressed to recover anything from the disk. I should mention that I am no expert in this area, and this is merely my rather casual understanding of the issue. Bill _______________________________________________ pen-l mailing list [email protected] https://lists.csuchico.edu/mailman/listinfo/pen-l
