I have purchased used HP dv2000 micro tower PC. Its specs are 2.8Ghz, 1GB, 160GB IDE. The mother board is Lite-on nr146. This is what I have. Vista was running fine. I installed a used 80GB IDE HDD after removing processor due to very tight space, it was duly detected by the system. As I am easy with XP instead of vista, so I thought to instal XP on 2nd HDD and used 1st HDD as data storage. XP installed and working fine, but to my bad luck the system did not detected 1st HDD (160GB) even after playing with its jumpers. I presume that this problem has something to do with IDE Channels on the mother board. Any advice please!!