Wiping Out Data

[Peter Garrett]

On Tue, 27 Mar 2007 14:17:45 -0400
"Jeffrey F. Bloss" <jbloss at tampabay.rr.com> wrote:

> It should also be noted that utilities like shred and dd can be utterly
> useless on file systems like ext3 because data is "cached" rather than
> committed to disk after every write operation. IOW, you could overwrite
> bits randomly 100 times, but it all happens in "RAM" so when the
> housekeeping is done you've only *physically* overwritten the bits once,
> with the last pattern your software used. Typically this is straight
> zeros, so you've really spent a lot of time accomplishing nothing much
> at all. :(

Interesting. Would it help/ make a difference to run " sync" after each
iteration ?

just curious...

Peter