I just got a Seagate Barracuda 1.5 TB internal hard drive.
Model Number: ST315005N1A1AS-RK. And I put it into a Rosewill external enclosure. I live at college so my father formatted it for me before sending it to me at college using Windows XP x86. My father moved some files onto it before sending it to me, so I know that it is working. I do not have access to another computer. Now that I have the hard drive, I cannot get Windows 7 Home Premium x64 to see the hard drive. I have unplugged the hard drive and restarted the computer many times. It uses external power and is plugged in. I am currently using USB to connect to my computer. I have a Studio XPS 1340. I know that you must make it active in Disk Management, but there is nothing in disk management except my primary hard drive.
Any help would be greatly appreciated, and if you need any more information just let me know and I'll gladly provide what I can.