That will surely do it without question. DBAN will not, however, wipe any hidden recovery partition, unless you let it. With DBAN, you can wipe the whole disk, individual partitions, or all disks it finds.
And you think that should do the trick?
I like Eraser - it uses DBAN technologies, but with a Windows GUI, which some folks find to be easier.
I still think wiping just free space (or filling it up with movies or songs a couple times) is more than enough to ensure all but Abby from NCIS will be unable to retrieve anything usable. That said, if you have any doubts, use DBAN (or Eraser).