‎Using the service tag, go to support.dell.com and read the manual(s), drivers, firmware etc. Press control C or R at boot up to access the raid config. Don't forget to check / upgrade the firmware.
Not a bad idea - - except Dell manuals are a joke.
There is absolutely no information that I could find using both Duckduck and ms google on how to setup the BIOS (and its absolutely NOT intuitive!!).
Don't you just love computers that require half a dozen training courses to use!
Upgrading the firmware is also a very good idea but to do so I first have to install MS windows on the machine as the upgrade package is a .exe file. That's sort of interesting when they tell you about RHEL, SUSE and a third Linux operating system option for the server itself. So although I would love to upgrade the firmware I'm not sure how I can actually do it - - - that may be why it hadn't been upgraded previously!