Floppy recovery

Mike Stein mhs.stein at gmail.com
Thu Jan 7 13:50:10 CST 2016

----- Original Message ----- 
From: "Fred Cisin" <cisin at xenosoft.com>
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
Sent: Thursday, January 07, 2016 1:58 PM
Subject: Re: Floppy recovery

>>> I've heard that there are "standards" for a number of overwrites, and
>>>  what patterns to use, . . .
> On Thu, 7 Jan 2016, Chuck Guzis wrote:
>> The paper that got the most notice was from Peter Gutmann from the early 90s.
>> https://www.cs.auckland.ac.nz/~pgut001/pubs/secure_del.html
> Thank you!
> That answers most of our ignorant questions.
> I wonder what the cost is to do those techniques.

Well, if you don't have access to thermite or even a large sledgehammer then this recommendation of his might be a cost-effective solution:


Even if you do have that sledgehammer this might be useful as a preprocessing step before final treatment with the aforementioned hammer.

I'm fortunate in already having some of the tools in this kit and some experience in their use and I can highly recommend this technique, not only for data destruction but also for relaxation and a source of various unique parts.

I wonder how many of those clocks made from HD platters contain sensitive information; definitely something else to worry about...


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