• PSU blank• PSU 2• 2.5 inch hard drive cageRelated LinksInstalling the power supply unit blankInstalling an AC power supply unitInstalling the optional 2.5 inch hard drive cageInstalling the optional 2.5 inch hard drive cageThe PSU 2 slot also functions as the optional 2.5 inch hard drive cage slot. If you install the 2.5 inch harddrive cage in the PSU 2 slot, your system will not support the redundancy feature.PrerequisitesCAUTION: Many repairs may only be done by a certified service technician. You should onlyperform troubleshooting and simple repairs as authorized in your product documentation, or asdirected by the online or telephone service and support team. Damage due to servicing that isnot authorized by Dell is not covered by your warranty. Read and follow the safety instructionsthat came with the product.1. Ensure that you read the Safety instructions.2. Follow the procedure listed in Before working inside your system.3. Remove the PSU/PSU blank, if installed. See Removing the power supply unit blank, Removing an ACpower supply unit.4. Install the 2.5 inch hard drives in the hard drive cage. See Installing a 2.5 inch cabled hard drive intothe hard drive cage.5. Route the power and signal cables through the hard drive cage slot.6. Keep the Phillips #1 screwdriver ready.Steps1. Slide the hard drive cage into the hard drive cage slot in the chassis.2. Secure the hard drive cage to the hard drive cage slot by using the screws.Next steps1. Connect the power cable to the system board.2. Connect the signal cables to the system board or expansion card.3. Follow the procedure listed in After working inside your system.Removing the optional 2.5 inch hard drive cage coverPrerequisitesCAUTION: Many repairs may only be done by a certified service technician. You should onlyperform troubleshooting and simple repairs as authorized in your product documentation, or asdirected by the online or telephone service and support team. Damage due to servicing that isnot authorized by Dell is not covered by your warranty. Read and follow the safety instructionsthat came with the product.1. Ensure that you read the Safety instructions.2. Follow the procedure listed in Before working inside your system.3. Remove the 2.5 inch hard drive cage. For more information, see Removing the optional 2.5 inch harddrive cage.84