You probably have to set them up through the perc. When its booting there should be an option to configure it before it goes into bios. This is a raid server right? Send a pic of the front
nah man theres a raid card on that fucker, the hard drive slides into a pcb sata connection and that plugs into a Perc 5/i card for example. @Sky identify what model and manufacturer server you have. You need to configure the hard drives.
Take a video of it booting from when you press the button to bios mate.