I've run into a bit of a problem while assembling my new home build. I've put everything together and the computer boots up fine, but apparently it's not seeing a harddrive. I've checked all of the connections (switched them out and everything to ensure it wasn't a faulty cord).
I have a WD 6400 AAKS, it may be DOA, but I just want to make sure I'm not missing anything.
I too have this problem and am yet to find anyone who can solve it. Hard disk in question is a HD250HJ by samsung on SATA port 2, spins up is detected by BIOS and BIOS scan checks ok but having been formatted on XP filled and used it has vanashed from XP all together. Leads swapped doesn't help, drive works fine on a different PC and the SATA port is fine as I have switched my master drive into it and it is found no problem. I know this does not help you out but if you are suffering the same fate I think we are out of luck
Your 8 pin connector is the alternative power source so no you won't need that. I have just had a nightmare with a similar problem. My bios detects the drive and can scan it but at a windows level it is nowhere to be found at all, even having been formatted and partitioned previously and having worked on the same pc before. turns out the 2nd SATA port on the motherboard has packed in which is a real bummer - hope thats not your problem