On Fri, Mar 7, 2008 at 8:45 AM, Les Schaffer <[EMAIL PROTECTED]> wrote: > Michael Perelman wrote: > > 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? > >
To reinforce what others are saying disks are different from RAM. They are NOT just 0s or 1s. There are residual images. Think of them as being partly analog rather than truly digital. 1 and 0 on a disk are really 1ish or 0ish. Hmm - don't know offhand whether this applies to flash memory as well. I know that the advantages of flash is that it is faster, uses less power, can be made lighter. Is it also more secure? Is stuff overwritten on flash drives truly overwritten? _______________________________________________ pen-l mailing list [email protected] https://lists.csuchico.edu/mailman/listinfo/pen-l
