I was just net-surfing and on this site ("click":http://www.oo-software.com/home/en/products/oosafeerase/index.html) I read:
bq. Overwriting with zeros (for very fast deletion)
And I had blink! in my head: I heard that when you write disc with zeros, yes you erase data for sure, but also, you can't write there anything in future.
But I'm not sure right now. If it's true, the only one and best way to use this programm, is only when you know that you will never use your hard disk again....
So? what is the real story with 0 and hdd?