Date: Sat, 19 Jan 2008 23:21:00 +0000 From: RW <fbsd06@mlists.homeunix.com> To: freebsd-questions@freebsd.org Subject: Re: Gutmann Method on Empty Space Message-ID: <20080119232100.7fc1c195@gumby.homeunix.com.> In-Reply-To: <4791A8F3.7090601@highperformance.net> References: <478F0D5A.9090107@highperformance.net> <20080117081414.GB12470@draenor.org> <478F1049.3000706@boosten.org> <20080117083837.GC12470@draenor.org> <20080117094332.K1563@wojtek.tensor.gdynia.pl> <20080117090210.GD12470@draenor.org> <478F8980.1090301@highperformance.net> <20080118175831.72929086@gumby.homeunix.com.> <4791A8F3.7090601@highperformance.net>
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On Fri, 18 Jan 2008 23:38:27 -0800 "Jason C. Wells" <jcw@highperformance.net> wrote: > It's interesting to note that Gutmann's earlier work said, loosely > "If you do this, you should be fairly certain you data is > unrecoverable." He now says, "A few passes of random data is as good > as can be expected." Those two standards of performance are very > different. But he goes on to say: "Looking at this from the other point of view, with the ever-increasing data density on disk platters and a corresponding reduction in feature size and use of exotic techniques to record data on the medium, it's unlikely that anything can be recovered from any recent drive except perhaps a single level via basic error-cancelling techniques." So even those few passes of random data are overkill. > I just want to make sure that any given day that the police > come take my functioning computers way that nothing can be recovered > that I explicitly deleted. The police just take disk images.
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