I'm a server novice and have been given a Dell 2850 (PERC 4e/Di). It has 3 blank HDs that I think are configured as RAID 5. I am trying to install W2K8 R2 SP1 on it. It doesn't have a DVD reader so I created an install USB. This works fine until it's time to copy files to the HD. It can't see a HD. There is an option to browse for drivers at this stage. Any idea what drivers I need and where to download them? I downloaded this driver RAID_DRVR_WIN_R227150.EXE but this failed with invalid signature. Thanks to dyasny for the link to LSI-LOGIC_MULTI-DEVICE_A00_R227150.exe.