[TriLUG] HD Block Size (newbieish question)

[rasch at raschnet.com]

On Mon, Jul 28, 2003 at 01:04:42PM -0400, B Smith wrote:
> I'm about to give an older computer to a friend of mine, but before I do 
> so I would like to clean the hard drive thoroughly. I was thinking that 
> a few ` dd if=/dev/urandom of=/dev/hda ` would do the job, but am unsure 
> of what block size to use. Is there an easy way to find out the hard 
> drive's block size?

For my own edification, why is this better than /dev/zero ?

Thanks,
David
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