Okay, so I have two WDC 640GB HDs, each with a Primary partition of 150GB and I Ghost some OS Images to them, but when I try to boot from these partitions, all I see is blinking cursor top left. It doesn't matter what OS (XP or Vista), they just can't boot. The same image boot fine on my two 500GBs with 100GB partitions. Is there something wrong with partitions bigger than 100GB? They are both Active as well, so I'm really puzzling now. Any assistance will greatly be appreciated. TIA...