Re: Wipedisk Question
- From: Spehro Pefhany <speffSNIP@xxxxxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 12 Aug 2009 21:48:08 -0400
On Thu, 13 Aug 2009 00:40:24 +0100, the renowned Nobody
<nobody@xxxxxxxxxxx> wrote:
On Wed, 12 Aug 2009 15:12:17 -0400, Spehro Pefhany wrote:
It may be just a rumor, but I've heard an acceptable military option is
to fire a .45 slug or two through the drive, case and all.
That sounds hopelessly optimistic for any modern HDD and really
sensitive data (though it would certainly stop the most common kind of
snooper). Most of the surface of the disk will be intact and MOST of
the data could be recovered. Even an intact chunk a few mm in size
could contain a lot of data because the surface density of data is so
high.
Once you can no longer read the disk with a read head above a spinning
platter, the cost of recovery is such that no-one is going to bother
unless they contents are important enough to land on the president's desk.
When it comes to circumventing chip security, some pretty impressive
stuff can be done with surplus equipment for < $10K worth of
equipment, and even more impressive on ~$1M equipment which can be
rented for a few hundred $ an hour.
Here's one possible disk data recovery method:-
http://www.elsevier.com/wps/find/bookdescription.cws_home/710529/description#description
If the drive is physically functional, an ATA "secure erase" command will
wipe it to the degree that it's unrecoverable by any known technology.
Yes, it should.. and probably will.. particularly if it's degaussed
afterward.
Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@xxxxxxxxxxxx Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
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