[clug] Scrubbing non-allocated blocks on ext2
dave
davico at tpg.com.au
Wed Jul 20 12:50:03 GMT 2005
Nice idea!
Of course, this wont get rid of slack space, and you'll want to be root
too so you can fill up the reserved area (usually about 5%).
Theres still nothing quite as foolproof as backing up your data and then
wiping your whole disk with that pattern a few times and putting the
data back again...
Dave
On Wed, Jul 20, 2005 at 10:30:38PM +1000, Paul Wayper wrote:
> At 07:55 PM 20/07/2005, you wrote:
> >Isn't there a simple command or script thing where you dd zeroes into
> >a new file until you fill the disk then delete the file you created.
> >
> >I can't tell you the exact dd command because I don't use it much.
>
> Well, slap my forehead and call me an idiot - 'cause I certainly
> did. This'll do nicely. You could even make a special FIFO which repeated
> the patterns out of Peter Gutmann's paper and use dd if=/dev/pattern1
> of=/file and so forth. Clever. Much neater. Let the file system do it
> itself!
>
> Of course, if you want _deniability_ rather than just _removal_ then things
> become all the more difficult... but then I should have just used wipe in
> the first place.
>
> Have fun,
>
> Paul
>
>
>
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