IBM 1269-3S2 Installation, Service And User Manual page 10

!
Warning
Figure P-8 PSU Safety Label (Electric Shock Hazard Inside)
Figure P-9 Redundant Power Input Switch Module Label (Hazardous Voltage)
!
Warning
x
Do not remove covers from the Power Supply Unit (PSU).
Danger of electric shock inside. Return the damaged PSU to
your supplier for repair.
Operation of the product with ANY modules MISSING in the
product's chassis will disrupt airflow and the drives will not
receive sufficient cooling. It is ESSENTIAL that all bays in a
product chassis are filled before operating the product.
IBM System Storage DCS9900 1269-3S2 Storage Expansion Unit Installation, Service, and User Guide