[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...


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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