This should be very simple, but I can't seem to get it right. I need a replacement drive for a Dell Latitude D400 notebook. I can't find any definitive documentation on standards for notebook drives. Wikipedia didn't help much. The 2.5 inch drive I pulled from my newer Panasonic fits nicely in the bay, but it is clearly not the right interface as the pins don't match up to the socket. I picked up what I though was the right drive from an auction site, but it appears to have the same pin configuration. Further complicating things, it looks like the D400 has different types of drives depending on when it was made. So what is the right interface for this thing?