Yep. Came to the same conclusion. Problem is I now can't boot off FireWire, plus if the physical discs are in it just reboots. Was going to try bo...

Can I plug in the internal discs on a Mac Pro 3.1 whilsts it's running? I thought it had to be turned off.

That's the problem, as I have a non Apple firmware video card, I don't get to choose a startup disk by using the alt key. I have to choose in sys pref...

I installed the same way that I did for the bootable copy on the fw drive. Ran the installer downloaded from the App Store. It did load once, inst...

Well, I've got to the last stage, booting the installed copy of OS X on the raid, and nothing. And it's nothing as I have a non Apple GPU, so I only ...

Thanks for the response. I did consider the SSD option, however, not that bothered about the increase in programmes loading - after all this is OS ...