On Sat, Sep 17, 2011 at 08:59:14AM +0200, Ralf Mardorf wrote:
> If you want to be safe, you need to overwrite the data several times,
Have anything to back that up? If you're using drives that used the old MFM
or RLL encoding schemes, and had massive space for bits per linear inch,
then sure, but on today's drives, with perpindicular encoding, and the
extremely dense bit capacity, going more than once is silly.
> 'shred' does delete data several times. We hardly are able to recover
> data that one time really was deleted at home, but CSI is able to do
> this
[citation needed]
> and I'm not talking about the trash that is produced by Jerry
> Bruckheimer. There e.g. are real methods with lasers that make it
> possible to recover magnetic data from sledgehammer deformed HDDs and
> even a private person legally just need to pay some k of Euros to a
> company and can benefit from those methods. OTOH nobody is able to
> factorise primes, it would take 20 or 30 years to crack openPGP with a
> super computer, but if there should be delicate data on your HDDs, that
> isn't encrypted, note, it just takes some seconds to open the door of
> your flat and to get your HDD that's still in use.
You may want to read this, as well as the references the article links to:
http://goo.gl/5QG4U
Claiming that you can recover data after a single pass of zeros on today's
spinning platters is urban legend. I guess if you like wasting your time,
go for it. I've got better things to do than do several passes on a 2TB
SATA disk, running at 30MBps, and I can sleep at night knowing that no one
will get access to the data.
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