Mailinglist Archive: opensuse (2459 mails)

< Previous Next >
Re: [opensuse] scrathsing old harddisks
  • From: "Greg Freemyer" <greg.freemyer@xxxxxxxxx>
  • Date: Thu, 27 Mar 2008 15:27:53 -0400
  • Message-id: <87f94c370803271227l34a09316lf859cae961fc48e5@xxxxxxxxxxxxxx>
On Thu, Mar 27, 2008 at 2:58 PM, Randall R Schulz <rschulz@xxxxxxxxx> wrote:
On Thursday 27 March 2008 09:50, Greg Freemyer wrote:
> I would love a true reference (from the last 15 years). I have spent
> many hours looking into the question. The best I have seen is people
> claiming they can recover a bit here and bit there from modern
> drives. Not even any full bytes.
> I have a NIST document that says labratory based recovery of data is
> impossible for disk drives 20GB or larger if the have been
> overwritten with a single pass of data. ie. Any data including all
> zeros.

That's not too surprising. All the new high-capacity drives use vertical
recording and exploit giant magnetoresistance for reading. Thus there's
much less magnetic energy associated with each bit recorded in these

If you could give a reference (or some rough identifying information)
for that NIST paper, I'd be interested in looking at it.

The url is:

And the quote in particular.

NIST Special Publication 800-88
Guidelines for Media Sanitization
August, 2006

"Advancing technology has created a situation that has altered
previously held best practices regarding magnetic disk type storage
media. Basically the change in track density and the related changes
in the storage medium have created a situation where the acts of
clearing and purging the media have converged. That is, for ATA disk
drives manufactured after 2001 (over 15 GB) clearing by overwriting
the media once is adequate to protect the media from both keyboard and
laboratory attack."

Greg Freemyer
Litigation Triage Solutions Specialist
First 99 Days Litigation White Paper -

The Norcross Group
The Intersection of Evidence & Technology
To unsubscribe, e-mail: opensuse+unsubscribe@xxxxxxxxxxxx
For additional commands, e-mail: opensuse+help@xxxxxxxxxxxx

< Previous Next >
Follow Ups