[ale] destroy old drives

Jim Kinney jim.kinney at gmail.com
Thu Apr 11 17:32:46 EDT 2019


NDBE - Network Device Block Encryption
On Thu, 2019-04-11 at 17:29 -0400, DJ-Pfulio via Ale wrote:
> Yet more reasons to use encrypted storage.
> Isn't there an enterprise solution for this using key servers to
> unlock thepartitions at boot?  Take the server/disks off the LAN and
> there aren't any keyservers available.
> 
> 
> On 4/11/19 4:31 PM, Alex Carver via Ale wrote:
> > If someone really wants your data, holes don't matter.  The rest of
> > theplatter is still intact in that case and can have the data
> > extracted.
> > There's also no guarantee that Dban can write enough to be sure
> > that themagnetic domains are fully randomized deep in the
> > platter.  The longerdata sits statically on the disk  the more
> > opportunity for the surfacedomain to imprint on deeper domains
> > (this is actually a problem withmagnetic tape, magnetic data can
> > print through from one layer of tape tothe next layer when it's
> > wound on the spindle).
> > A serious entity can perform a deep level scan of the platter
> > andretrieve the low level signal under the surface domains and see
> > previousdata.  The drive head typically isn't powerful enough to
> > write thatdeeply because it has to keep the tracks narrow.
> > On 2019-04-11 12:13, Steve Litt via Ale wrote:
> > > On Wed, 10 Apr 2019 22:11:42 -0400Jim Kinney <
> > > jim.kinney at gmail.com> wrote:
> > > > Dban advantage: it can be done across hundreds or thousands of
> > > > drivesbefore larcenous third party "shredders" physically touch
> > > > the drives.
> > > 
> > > That's a good point.
> > > Doesn't dban take an hour or more? How many drives can I do with
> > > onecomputer? How long would it take to test whether each is
> > > really blank?
> > > What might be nice with 1000 drives to do is dban followed by
> > > drilling3 holes in each drive. I'd say each drive would take 1
> > > minute for 3holes, so it's about 2 days for one employee to drill
> > > the holes. Or,perhaps, one employee could both dban and drill the
> > > holes, drilling theholes while the next batch is dbanning.
> 
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-- 
James P. Kinney III

Every time you stop a school, you will have to build a jail. What you
gain at one end you lose at the other. It's like feeding a dog on his
own tail. It won't fatten the dog.
- Speech 11/23/1900 Mark Twain

http://heretothereideas.blogspot.com/

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