I installed a brand new hard drive in my hp pavilion ze4630 and even when booting from the the Win XP disk it does not see the new hard drive. I tried using a Win Me disk in an attempt format from dos but unit does not boot into dos. The hard drive is a Toshiba MK4025GAS and i did not find a driver on their site. What do i need to do to initialize a virgin hard drive ? Also tried installing as slave drive to my desktop and format with functioning Win XP but it also did not see the drive. Thanks for assistance with this matter.