You can find the 7.12.x support CD for that controller at https://www.ibm.com/support/pages/ibm-serveraid-software-matrix. I’m pretty sure that server model did not support USB booting so you’ll need to burn that to a disc. This will be the disc to boot off of to create your array(s).

I forget if the support CD had the application you would install in Windows to manage things after installation or not, or if that’s only on the application CD. Either way you’ll find several downloads for various OS drivers and the applications from that matrix.