wipe /dev/sda

[Gregg Hastings]

I have a disk I'm getting rid of via eBay.  For whatever reason I can't
get DBAN to load on that laptop.  I was thinking about doing dd
if=/dev/urandom of=/dev/sda from knoppix but then I ran across wipe.

After looking over the man page I can't decided which, if any, options
to include with wipe /dev/sda.

Can anyone point me in the right direction?  From what I read it will be
doing a 34 pass wipe by default with no options present.  Which is fine
for the information the disk used to hold.  Nothing overly sensitive.

Experiences?