mitch wrote:
But also factor in the time.... 00 a 1TB or 3TB hard drive...And not only time, factor in "stress".
Talking of software solutions, let's say a plain dd, a fastish SATA 3 may allow (if you are lucky, have a good controller and what not) 120÷130 Mb/s, i.e. hopefully a 1 TB disk should "go" in something more than 2 hours, but it is more likely (when it comes to selling old hardware, the hardware is old <img src="images/smiles/icon_wink.gif" alt="Wink" title="Wink" /> ) that as much as 6 hours are needed.
For a USB 2.0 connected disk, it may take as much as 12 hours.
(on perfectly working disks, with no "slow sectors" or the like)
Now consider how writing all 00's is most probably faster than generating specific or random patterns, but let's forget about this and multiply those times by 2,4, 7 or 35!
A disk being run in continuous write operations for several hours is however, in my experience, useful to cook eggs (to remain in terms related to cryptography/security,scrambledeggs) <img src="images/smiles/icon_eek.gif" alt="Shocked" title="Shocked" /> .
jaclaz
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