Can dd cross device boundaries?

[Francois Marier]

Hi,

(I'm guessing this might be the right list, but feel free to let me know if
there's a better one.)

It looks like I've hosed one of my hard drives through some clueless use of
the dd command (as root of course) and I'd like to understand what I did
wrong.

I was trying to erase /dev/sda entirely so I did this:

  dd if=/dev/zero of=/dev/sda bs=8192 count=122095323

(That last number being the size of the drive in bytes divided by 8192.)

My question is: is it possible that it could have gone pass the end of
/dev/sda and continued writing onto /dev/sdb?

Cheers,
Francois

-- 
Francois Marier                         identi.ca/fmarier
http://fmarier.org                    twitter.com/fmarier