Troubleshooting Your System 117Troubleshooting a Hard DriveCAUTION: 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.CAUTION: This troubleshooting procedure can destroy data stored on the harddrive. Before you proceed, back up all files on the hard drive.1 Run the appropriate online diagnostics test. See "Using OnlineDiagnostics" on page 121.Depending on the results of the diagnostics test, proceed as neededthrough the following steps.2 If your system has a RAID controller and your hard drives are configured ina RAID array, perform the following steps:a Restart the system and enter the host adapter configuration utilityprogram by pressing for a PERC controller or for a SAS controller.See the documentation supplied with the host adapter for informationabout the configuration utility.b Ensure that the hard drive(s) have been configured correctly for theRAID array.c Take the hard drive offline and reseat the drive.d Exit the configuration utility and allow the system to boot to theoperating system.3 Ensure that the required device drivers for your controller card are installedand are configured correctly. See the operating system documentation formore information.4 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 and UEFI Boot Manager" onpage 35.If the problem persists, see "Troubleshooting Expansion Cards" onpage 118.
