kickstart : physical volume

[Sir June]

Hi,

How do i specify in the kickstart file to create a physical volume using 2 or 3 disks?  I had used "part pv.01 --size=30000 --grow --ondisk=sda"      for a single disk.  I have 3 x  36GB hard disks and I want to use them all in one physical volume.

thanks,

 Sir June