Installing Centos 7 on HP G7 Server

When I first initially tried it, the installer cannot detect any local hard disk to install to. After much googling found out that it was because a certain driver for the Smart Array Controller is no longer available on Centos 7. To allow for use of the new driver on old hardware, you need to enable the option. Once the DVD has booted and on the first menu screen, highlight the first option and then press tab which would bring you to a command line where you can add additional parameters to boot. Add the following parameters:

hpsa.hpsa_allow_any=1 hpsa.hpsa_simple_mode=1

And then press enter to boot. You should now be able to install as you wish. After installation, on the first boot, make sure at the menu, press 'e' to edit the parameters and add them again. Then once booted, go to /boot/grub2/grub.cfg to permanently add the parameters to the menu. Refer to http://serverfault.com/questions/611182/centos-7-x64-and-hp-proliant-dl360-g5-scsi-controller-compatibility and it's comments for the explaination.