Chapter 4 System Housing4-74.3.3Internal StructureThe following figure shows the housing internal structure and some of the basicsystem components.Power SupplyMetal Plate(coveringtwo/oneredundantpower supplymodules)Expansion SlotBracketsSystem BoardBackplane BoardSCSI Drive Trays3.5-inch and 5.25-inchDrive BaysCPU Board