I have a Proliant DL360 G7 server. I added an optional drive expansion back plane to accommodate more drives. I removed the CD ROM. When I boot up on the smart start cd to configure my drives, I only see 4 x drives which are in the primary back plane. I have a P410i controller. Why can I not see my other drives. When I hold down the power button, all drives flash. I have 146GB SAS drives.