Installing System Components 619 Run the SAS controllers tests and the hard-drive tests in the system diagnostics. See "Running theSystem Diagnostics" on page 112.If the hard drive fails the hard-drive tests or does not operate properly, see "Getting Help" on page 121.Hot-Plug SATA Hard Drives Using the SAS BackplaneIf you are using the optional SAS backplane, the SATA hard drives you install are hot-pluggable if thebackplane is attached directly to the SAS controller card on the system board (see Figure 3-13). Forinstructions on installing the optional SAS backplane board, see "Removing and Installing the Optional SASBackplane Board" on page 61.The SAS backplane supports up to four hot-plug hard drives connected to the optional SAS controller card.The SAS controller card must be connected to channel A on the optional SAS controller card, or port 0 onan optional RAID controller card. For instructions on installing the optional SAS backplane board, see"Removing and Installing the Optional SAS Backplane Board" on page 61.Removing and Installing the Optional SAS Backplane BoardThe optional SAS backplane board supports hot-plug SAS or SATA drives (if an optional SAS controller cardis installed in the system).CAUTION: Only trained service technicians are authorized to remove the system cover and access any of thecomponents inside the system. Before performing any procedure, see your Product Information Guide forcomplete information about safety precautions, working inside the computer, and protecting against electrostaticdischarge.1 Turn off the system, including any attached peripherals, and disconnect the system from the electricaloutlet.2 Open the system. See "Opening the System" on page 43.3 Remove all existing hard drives from the hard drive bay. See "Removing a Hard Drive from the DriveBay" on page 54.4 Install the SAS backplane:a Lower the backplane into the system and align the backplane with the retention hooks on thedrive bay, then fit the backplane over the retention hooks.b Slide the backplane board toward the front fan about 12 mm (0.5 inch) until it clicks into place.
