"Data Center" drive not detected/doesn't start up

I got a new 6TB WD "DC HC310", which is a "data center" disk. The vendor included a power adapter (IDE power to SATA style), but I don't have an IDE power cable on my PSU anymore. When I put the drive in an external USB box, it works just fine. So, is there a way to detect this and start it from software, or do I just need to move some power supplies around and get it to work that way?

Bob