Figure 13. Removing and Installing a 3.5 Inch Physical Drive Into a Physical-Drive Carrier1. physical-drive carrier 2. physical drive3. screws (4)Installing a Physical Drive Into a Physical-Drive CarrierCAUTION: 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. Insert the physical drive into the physical-drive carrier with the connector end of the physical drivetoward the back.2. Align the screw holes on the physical drive with the back set of holes on the physical-drive carrier.When aligned correctly, the back of the physical drive is flush with the back of the physical-drivecarrier.3. Attach the screws to secure the physical drive to the physical-drive carrier.RAID Controller ModuleAn MD3400 and MD3420 series storage array supports single as well as dual RAID controllerconfigurations. If only one RAID controller module is installed in your array, it must be installed in slot 0.You must install the RAID controller module blank in slot 1.22