[CentOS] Question about dd (fill a hard disks' unused space with blanks)

Sun Jun 7 17:54:53 UTC 2009
Niki Kovacs <contact at kikinovak.net>

Rainer Duffner a écrit :
> 
> Ever booted a live-CD?
> It also knows your disks (unless it's a server, except for maybe the  
> CentOS LiveCD, most other's suck on servers - they simply don't  
> recognize the controllers).

The question was not about the LiveCD, but more about the use of dd. So, 
blanking a disk (say, /dev/hdc) from a LiveCD would amount to:

# dd if=/dev/zero of=/dev/hdc bs=20M

And that's it. Correct?