I know this is a long shot for the MR forums, but here goes: I have my old HD from my Dell POS E510. The drive is a Seagate Barracuda 7200.7 (SATA). THe problem is that it doesn't fit in the two hard drive cases I currently have, so I need to buy a new one. There are several hookup configurations it seems for SATA Power/Signal and Jumper Block. How do I know which one to buy? Is there a site that matches serials numbers with case models? Any help would be greatly appreciated. Thanks so much!