Hi and thanks for your reply, On Wed, Mar 9, 2011 at 6:33 PM, <m.roth at 5-cent.us> wrote: > Peter Peltonen wrote: >> Based on that info I assume the board having a "8x SAS Ports via LSI >> 1068E Controller". We received the server with 3 drives + 1 spare as >> hw RAID-5 preinstalled. During bootup I see that the drives are >> initialised and everything seems ok. >> >> The issue I am facing is that when trying to install CentOS no hard >> drives are recognised. > <snip> > I recently had a problem like that with a Dell box. The trick is that with > a hardware controller, it supercedes software RAID. What you need to do is > go into the firmware controller configuration on boot, before you get to > grub, and make sure everything's visible and correct. The controller can > see the drives, but not present them to the o/s if you don't. Hmm, I am not sure if I understand you correctly: are you saying that in the firmware configuration there might be an option that makes the disks invisible for the OS? This sounds a bit strange and I wonder what such config could be... Or are you suggesting that I should put the controller in "JBOD mode" and then use software RAiD instead of hardware RAID? I would not like to go with this option as I think the performance would suffer this way? Regards, Peter