4 Mar
2010
4 Mar
'10
7:22 p.m.
John Doe wrote:
From: chloe K chloekcy2000@yahoo.ca
What is the best practice to remove all data in the disk? ls fdisk ok or use dd
Maybe something like (replace the ?):
- fast but not secure: dd if=/dev/zero of=/dev/?d? bs=4096
- slow but more secure: dd if=/dev/zero of=/dev/?d? bs=4096
What is the difference between the above two commands? Did I miss something?
- n times slower but n times more secure: for ((i=1; i<=n; i++)); do dd if=/dev/zero of=/dev/?d? bs=4096; done
I don't know what "n times more secure" means. Could you please explain? Does that mean that, with n times as much work, one can still recover the information?
Mike
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