Power supplyPower-supply handlePower-supplyrelease tab4. Grasp the handle on the rear of the power supply and slide the power supplyforward into the power-supply bay until it clicks. Make sure that the powersupply connects firmly into the power-supply backplane.5. Connect the power cord for the new power supply to the power-cord connectoron the power supply.6. Connect the other end of the power cord to a properly grounded electricaloutlet.7. Make sure that the ac power LED and the dc power LED on the power supplyare lit, indicating that the power supply is operating correctly. The two greenLEDs are to the right of the power-cord connector.If you have other options to install or remove, do so now. Otherwise, go to“Completing the installation” on page 45.Installing a Y power cableA Y power cable comes with the power-supply option. Cable the servers as shownin the illustration to ensure server redundancy. Use one Y power cable to providepower to two servers. Each Y power cable must be connected to a different powersource, such as a power distribution unit (PDU), to maintain redundancy.Cable-management armCable-management armY cable AY cable BInstalling a hard disk driveLocate the documentation that comes with the hard disk drive and follow thoseinstructions in addition to the instructions in this chapter.Note: Do not mix SAS hard disk drives with SATA hard disk drives.30 IBM System x3550 Type 7978: User’s Guide
