单选题A retail customer is looking at ways to reduce power requirements. They are considering deploying two hundred IBM HS22 blades running Red Hat Linux in the IBM BladeCenter E chassis. The customer has already chosen Intel L5640 CPUs to reduce power. Whic

A retail customer is looking at ways to reduce power requirements. They are considering deploying two hundred IBM HS22 blades running Red Hat Linux in the IBM BladeCenter E chassis. The customer has already chosen Intel L5640 CPUs to reduce power. Which on-board storage option allows the customer to reduce power consumption of each blade？（）