I have a Dell PE 1850 that I am trying to get RAID setup on. During boot the system sees two hard drives at HBA 0 and 1 but then when it prompts me for Raid setup press Ctl-M and I do and enter the Perc setup I do not see any physical drives. How am suppose to setup a logical Raid drive? If go to install windows server I see the two drives separately.
As suggested grab the drivers you need from the Dell support site for 1850s. You can try for individual drivers or just grab the SUU/Server Update under systems management- this has the whole repository of drivers for your system (just select your OS from the drop-down). Also here is a nice walkthrough on creating the RAID. If you see them in Windows setup then you should be able to see them in RAID configuration. If CTRL-M isn't working you can also try to run the System Configuration disk, also under systems management. This allows you to apply updates from repository, configure your raid, and copy Windows Preinstall files to the system.