Hopefully this is just a quickie,
I have a HP server with 8 SAS drives in it. The machine is fresh and at present has nothing on it. When I boot it up it only detects 6 of the drives. I enter the HP Smart Array utility and it has the other two drives as options.
The drives each have two lights, at boot up the drives in question have the lights off. When I select them using the utility, the blue lights appear, but not the green. Then I select the array type and accept and the machine sets up the array but the lights on the bottom two drives are still off.
I hope this makes sense. I am probably just doing something stupid.