Quick question on Hard Drive back-ups

I'm getting ready to purchase my hard drive that I will use for backing up my two production drives (The system and my personal/games hard drives). My question is this my C: drive is a separate physical hard drive (500GB) with my Windows OS, my D: drive (2TB) is a second physical hard drive that houses all my personal stuff including my games. I remember someone telling you can only have one bootable HDD clone. So since I only have one operating system (Windows 7 Ultimate 64-bit) can I create a clone of both partitions or can only the Windows drive be made a clone?

This is the hard drive I was gonna use for backing up: http://www.newegg.com/Product/Product.aspx?Item=N82E16822149396

And this is the program I was gonna use: http://download.cnet.com/AOMEI-Backupper-For-Win7/3000-2242_4-75875677.html

 

I don't see way not if you make two different partitions i do not think this would matter but i am not an expert on this.