> 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? No, not as such. You just have to define the arrays: sssign the drives as needed. It's a rare thing that a factory will set up the controller and drives in a way that suits your needs. I think you mentioned that Centos does see the controller, (but listing a different number) and isn't seeing the drives. Which is why myself and others are mentioning configuring the drives within the controller's bios. The number Centos sees might just be the controllers chipset number rather than the controller's part number...