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Securely erasing all data from a hard drive

I am using Windows 7 64bit on normal HD drives. SATA 2. I don't have a boot disc or copy of Windows.

I want to complete format both my HD and leave nothing on them (including Win 7) can I do this using a command line or do I need some special dos boot disc?

I also want to COMPLETELY erase the HD - I want to fully erase all my disc contents. I have heard all discs contain a history (police, forensics) I want it fully clean.

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marked as duplicate by Nick Josevski, studiohack Feb 14 '12 at 23:34

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
Also have a look at: superuser.com/questions/4678/… –  Nick Josevski Feb 14 '12 at 22:30
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2 Answers 2

up vote 3 down vote accepted

There are a number of tools. All will require you to boot from CD/DVD or similar.

I used the following ones on several occasions:

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+1 DBAN if you really want to ensure all data is erased. –  Nick Josevski Feb 14 '12 at 22:28
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A low level format format in any filesystem using an Ubuntu LiveCD should do the trick. But honestly, if it was mine, and I was in legal trouble, I would take the drive out and destroy it with a hammer.

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Toss it in the lake and hope it doesn’t float back up in the spring. :-D –  Synetech Feb 15 '12 at 1:46
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