Question on securely erasing old hd before dumping

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Re: Question on securely erasing old hd before dumping

Postby cynwulf » 2012-08-02 10:31

Another +1 for dd...

Once a drive has been 0 filled, you cannot recover data, there are no tools in existence which can recover something which is simply not there. The idea that some intelligence agency can still recover data is complete bollocks put out by unscrupulous developers of 3rd party security software for wintards...
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Re: Question on securely erasing old hd before dumping

Postby kiyop » 2012-08-02 10:57

I vote for "shred -n 1 -v".

EDIT at Fri Aug 3 07:18:22 JST 2012:
4D696B65 wrote:
dasein wrote:The dd method discussed in the link provided by vbrummond, however, is perfectly adequate to wipe the drive clean. And it's way quicker than shred.

Shred is slower because it does multiple writes while dd does only one.
The purpose of shred is to shred, dd is a copy command
.
I guess it has much to do with your level of paranoia.

I see. Thanks. :)
I have thought that "shred -n 1 -v" is faster than "dd if=/dev/urandom of=".
Last edited by kiyop on 2012-08-02 22:12, edited 3 times in total.
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Re: Question on securely erasing old hd before dumping

Postby 4D696B65 » 2012-08-02 11:03

kiyop wrote:I vote for "shred -n 1 -v".

So do I.
dasein wrote:The dd method discussed in the link provided by vbrummond, however, is perfectly adequate to wipe the drive clean. And it's way quicker than shred.

Shred is slower because it does multiple writes while dd does only one.
The purpose of shred is to shred, dd is a copy command
.
I guess it has much to do with your level of paranoia.
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Re: Question on securely erasing old hd before dumping

Postby cynwulf » 2012-08-02 11:24

4D696B65 wrote:I guess it has much to do with your level of paranoia.

I learned to stop worrying about extra dimensional beings stealing my data.

If in doubt though, the best approach is a star head (torx) screwdriver (I think it's a "T8") and just dismantle the drives and wreck the platters...
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Re: Question on securely erasing old hd before dumping

Postby 4D696B65 » 2012-08-02 11:33

cynwulf wrote:
4D696B65 wrote:I guess it has much to do with your level of paranoia.

I learned to stop worrying about extra dimensional beings stealing my data.

If in doubt though, the best approach is a star head (torx) screwdriver (I think it's a "T8") and just dismantle the drives and wreck the platters...

I just hammer a few nails in an old drive so a garbage man with my curiosity will give up.
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Re: Question on securely erasing old hd before dumping

Postby dasein » 2012-08-02 18:22

Oh for the love of J "Bob" Dobbs...

US National Institute of Standards and Technology (NIST) wrote:For ATA disk drives manufactured after 2001 (over 15 GB) clearing by overwriting the media once is adequate to protect the media from both keyboard and laboratory attack.
Available: http://csrc.nist.gov/publications/nistp ... errata.pdf

Center for Magnetic Recording Research, U. of California, San Diego wrote:...the multiple overwrite approach is not very much more effective than a single overwrite
Available: http://cmrr.ucsd.edu/people/Hughes/docu ... 08_000.doc


To paraphrase Daniel Moynihan, folks are certainly entitled to their own opinions, but not their own facts.

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