How do I write zeros without an application?

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Supasized

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Jan 20, 2012
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Hello,
I want to completely erase my primary, and only hard drive. Is there a way to do it form BIOS or a boot cd? I know windows install disks can do a format process, but does that erase everything too?
 
There is a lovely boot CD that will erase your HDD to the highest standard (per the National Institute of Standards and Technology) by issuing a "Secure Erase" command to the hard drive. If your HDD is modern (and this command is over five years old), it will erase itself over the course of the next few hours.

I use the Parted Magic boot cd, using the Erase tool and selecting the Secure Erase option (last on the list, I think)
 
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