186 Troubleshooting Your SystemTroubleshooting a Tape Backup Unit1 Ensure that the tape drive is turned on.2 Try using a different tape cartridge.3 Ensure that the device drivers for the tape drive are installed and areconfigured correctly. See your tape drive documentation for moreinformation about device drivers.4 Ensure that the tape drive’s interface cable is fully connected to theexternal port on the controller card.5 For SCSI tape drives, verify that the tape drive is configured for a uniqueSCSI ID number and that the tape drive is terminated or not terminated,based on the interface cable used to connect the drive. See thedocumentation for the tape drive for instructions on selecting the SCSI IDnumber and enabling or disabling termination.6 Run the appropriate online diagnostics tests. See "Using OnlineDiagnostics" on page 193.If you cannot resolve the problem, see "Getting Help" on page 203.7 Reinstall the tape-backup software as instructed in the tape-backupsoftware documentation. See your tape documentation for informationabout reinstalling the software and troubleshooting the tape drive.Troubleshooting a Hard DriveCAUTION: Many repairs may only be done by a certified service technician.You should only perform troubleshooting and simple repairs as authorized inyour product documentation, or as directed by the online or telephone serviceand support team. Damage due to servicing that is not authorized by Dell is notcovered by your warranty. Read and follow the safety instructions that camewith the product.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 193.Depending on the results of the diagnostics test, proceed as neededthrough the following steps.