[UFO Chicago] recommendations for completely erasing a hard drive?
jordanb at hafd.org
Mon May 28 21:13:19 PDT 2007
On Mon, May 28, 2007 at 07:36:21PM -0700, Jesse Becker wrote:
> --- Brian Sobolak <brian at planetshwoop.com> wrote:
> > Charles Marshall wrote:
> > > Brian,
> > > Boot into a Knoppix cd, then:
> > >
> > > cat /dev/zero > /dev/[s|h]d[a|b|c|d]
> > >
> > > Haven't done it in a while, but I think that worked
> > when I had to do it.
> > Hmm. That would certainly work, but I seem to recall a
> > tool that did 5
> > passes (all 1s, then all 0s, etc.) to make sure it was
> > erased. Does
> > that ring a bell?
> The incantation above is a bad idea. Yes, it will nuke the
> data, but a large portion of that data is probably
> retrievable. At least use random data, and dd is faster
> than cat:
> dd if=/dev/random bs=4k of=/dev/[sh]d[a-f]
You can do this very easily from any recovery CD, for instance:
Which I find to be a great program.
BTW: To make it not take ten centuries to write several gigabytes,
I'd recommend using /dev/urandom rather than /dev/random.
Jordan Bettis -- Chicago Il.
Photographs of Life in the Neighborhoods of Chicago
More information about the ufo