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?
On Fri, Mar 07, 2008 at 09:22:35AM -0600, Bill Lear wrote: > Not reliably. First, wiping an ENTIRE disk is easy, but you have to > hit each byte on the disk with multiple patterns of write --- > otherwise you risk leaving enough information to recover. Writing the > Bible over things just overlays those bytes on top of others and is > sort of like writing 555-1212 down, then writing 123-4567 on top --- > you can still make out the 555-1212 part, and you need to write many > more things on top of it until it is fully obscured. > > Wiping a single file is MUCH harder, as the operating system or > application may have stored copies of it in various places (temporary > files, swap space for the OS, etc.). > > > Bill > _______________________________________________ > pen-l mailing list > [email protected] > https://lists.csuchico.edu/mailman/listinfo/pen-l -- Michael Perelman Economics Department California State University Chico, CA 95929 Tel. 530-898-5321 E-Mail michael at ecst.csuchico.edu michaelperelman.wordpress.com _______________________________________________ pen-l mailing list [email protected] https://lists.csuchico.edu/mailman/listinfo/pen-l
