partition syntax

[Stephen Mah <smah@xxxxxxxxxx>]

what's the partitioning syntax to use an existing partition, say a swap 
partition from redhat 7.2 and reformat it for rhel3?

I essentially want to use the same swap partition for both 7.2 and el3.

I tried part swap --onpart /dev/sda2

I'm getting unable to open /dev/sda2 for the use of "none"

-steve