Having problems with a failing hard drive, but it is necessary for booting windows 7 off another

Here is my situation:
My computer has 3 hard drives. [1] One is failing, and my computer shuts off by itself when it fails, it has my old windows 7 OS that I no longer use and want to just take the entire hard drive out completely. [2] The other is for media, no OS installed, and the [3] third is my new drive that I am going to run a fresh copy of windows 7 off of. When I try running the new OS on [3] without [1] I get an error saying "disk boot failure insert system disk and press enter." I don't have a system disk, so I can't load windows. I checked BIOS to make sure it was booting from the correct drive, and tried running it without [2] and [3] with the same problems. If [1] is connected with [3] then everything loads fine. Does anyone have suggestions for how to fix this problem?

 

So are you trying to boot from your new and empty disk [3] or from OS install disk?
Remove all other drives except [3] and DVD and make your pc boot from DVD with install disk in it.

 

I don't have the install disk, which makes the problem. [3] Has Windows 7 installed on it already.

 

I believe both are sandisk. is there a program to clone the hard drives? that would definitely be the best / obvious i cant believe i didn't think of it solution. i am going to assume copy pasting doesn't work?

 

change boot sequence to the new drive