270 Troubleshootingd Exit the configuration utility and allow the system to boot to theoperating system.2 Ensure that the required device drivers for your controller card are installedand are configured correctly. See the operating system documentation formore information.3 Restart the system, enter the System Setup program, and verify that thecontroller is enabled and the drives appear in the System Setup program.See "Using the System Setup Program" on page 55.If the problem persists, see "Getting Help" on page 289.Troubleshooting a Storage ControllerNOTE: When troubleshooting a SAS RAID controller, also see the documentationfor your operating system and the controller.1 Enter the System Setup program and ensure that the SAS controller isenabled. See "Using the System Setup Program" on page 55.2 Restart the sled and press the applicable key sequence to enter theconfiguration utility program.• for a LSI SAS 2008 mezzanine card• for a MegaRAID SAS 9265-8i cardSee the controller’s documentation for information about configurationsettings.3 Check the configuration settings, make any necessary corrections, andrestart the system.CAUTION: Many repairs may only be done by a certified service technician. Youshould only perform troubleshooting and simple repairs as authorized in yourproduct documentation, or as directed by the online or telephone service andsupport team. Damage due to servicing that is not authorized by Dell is not coveredby your warranty. Read and follow the safety instructions that came with theproduct.4 Turn off the sled and attached peripherals.5 Remove the sled from the enclosure. See "Removing a Sled" on page 141.6 Open the sled. See "Removing the Front and Back Sled Covers" onpage 161 or "Removing the Sled Cover" on page 166.