116 Troubleshooting Your SystemTroubleshooting a Tape Backup Unit1 Try using a different tape cartridge.2 Ensure that the device drivers for the tape backup unit are installed andare configured correctly. See your tape drive documentation for moreinformation about device drivers.3 Reinstall the tape-backup software as instructed in the tape-backupsoftware documentation.4 For external tape drives, ensure that the tape drive’s interface cable is fullyconnected to the external port on the controller card. For internal tapedrives, check the cable connections:a Turn off the system and attached peripherals, and disconnect thesystem from the electrical outlet.b Open the system. See "Opening the System" on page 57.c Reseat the controller card in the expansion card slot.d Ensure that the tape drive's interface cable is fully connected to thetape drive and to the connector on the controller card (SAS or SCSI).e Ensure that a power cable is properly connected to the drive and tothe system board.f Close the system. See "Closing the System" on page 58.5 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 the documentation for the tape drive for instructions on selecting theSCSI ID number and enabling or disabling termination.6 Run the appropriate online diagnostics tests. See "Using OnlineDiagnostics" on page 121.If you cannot resolve the problem, see "Getting Help" on page 129.
