Quantum LTO-3 manual Slow Backups

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Chapter 7 Troubleshooting Guide

Troubleshooting Suggestions

This message means the tape drive does not recognize the cleaning tape as being of a valid type. You may have purchased a cleaning tape that is not supported by the tape drive. Purchase a supported cleaning tape.

3If the tape drive issues a message to backup software to instruct you to clean the tape drive, you may see the message:

The tape drive needs cleaning:

1If the operation has stopped, eject the tape and clean the drive.

2If the operation has not stopped, wait for it to finish and then clean the drive.

3Check the tape drive users manual for device specific cleaning instructions.

This message means you should use a supported cleaning tape.

Slow Backups

There are many factors that can make backups appear to be “slow.” To achieve the highest possible transfer rate, the LTO-3 tape drive MUST be attached to a Low Voltage Differential (LVD) SCSI controller capable of a minimum of 80 Mbytes/s and MUST not share the same SCSI bus as another active SCSI device such as hard drives.

1Is the tape drive attached to an LVD SCSI controller? This can be determined by viewing the boot process of the system and looking to see what controller the tape drive is attached to. There may be boot log files that can be examined to determine what SCSI controller the tape drive is attached to.

2If the tape drive is not attached to an LVD SCSI controller, attach the tape drive to a LVD SCSI controller to achieve best possible hardware performance for best possible transfer rate.

3If the tape drive is attached to an LVD SCSI controller, see whether the tape drive is the only device on the SCSI cable? This can be determined by viewing Windows Device Manager, viewing Unix/ Linux logs, or by viewing SCSI controller during system boot up.

4If other SCSI devices are attached to the SCSI controller and are active during the time when a backup is performed to the tape drive, have the tape drive as the only device on the SCSI cable to achieve the best possible backup performance.

LTO-3 Tape Drive User’s Guide

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Contents 72 Copyright Statement Contents Chapter Operation Chapter Specifications Chapter Troubleshooting Guide Figures Figures Viii Tables Tables Preface AudiencePurpose Document OrganizationNotational Conventions Related SCSI-2 SpecificationDocuments ContactsTechnical Publications Quantum HomeCustomer Support Overview 1Overview, Unpacking Instructions and Quick StartFeatures Drive ConfigurationsUnpacking and Inspection Internal LTO-3 Quick Start GuideTape Drive Quick StartDesktop LTO-3 Internal Tape Drive Guidelines and CautionsLTO-3 Tape Drive User’s Guide Drive Installation Instructions 2InstallationInstalling an Internal LTO-3 Tape Drive Configuring anLVD Drive Jumpers Jumper SettingsTerminator Power Acceptable Mounting Orientations Mounting Internal LTO-3 Tape DriveInternal LTO-3 Tape Drive Mounting Dimensions ADI Fixed Board ConnectorADI Free Cable ConnectorADI Free Cable Connector Rear View of the Internal LTO-3 Tape drive Pin Number Description Connecting a Serial Cable for Tape LibrariesConnection Name Type Driven By Connection Definition Connecting a Power Cable Installing the LTO Driver Installing a Desktop LTO-3 Tape DriveInstallation Installing a Desktop LTO-3 Tape Drive Scsi Termination Examples for the Desktop LTO-3 Tape Drive Commercial backup application software Installation Installing a Desktop LTO-3 Tape Drive 3Operation Shows a view of the LTO-3 front-panel display Understanding the Front Panel DisplayEOT Blink CodesLoading a Cartridge Unloading a Cartridge Using LTO CartridgesWrite-protecting a Cartridge Drive Maintenance MaintenanceCartridge Care Operation Drive Maintenance Parking the Drive for Shipping Using the Load/ Unload Button to Park the DriveTrack Layout 4TheoryShows the layout of data on an LTO tape Recording Method Data BufferData Integrity C1 ECC Faults Data CompressionServo-tracking Data Compression Considerations Compression Intelligent DataTheory Data Compression 5Specifications Physical Specifications Shows the dimensions of the internal LTO-3 Tape Drive Specification +12 VDC + 5VDC Power SpecificationsSpecification Value Drive Performance SpecificationsEnvironmental Requirements Specification Operational Non-operationalInjected Noise ReliabilityMean Time Between Failures Specification DescriptionMean Time to LTO Cartridge SpecificationsReplace EnvironmentalReliability Regulatory ComplianceIecee Country Regulatory Organization Compliant toPREDOM-OBR Disposal of Electrical and Electronic Equipment LTO-3 Tape Drive User’s Guide 6UNIX Settings Word About Scsi Controllers Configuring for the DEC/Compaq Unix EnvironmentTargets Finding CurrentTypes ConfiguringControllers Device File st.confLTO-3 Tape Drive User’s Guide Configuring LTO-3 Tape Drives Using SmitFinding Existing This command produces output similar to Configuring for SCO Open ServerConfiguring the LTO-3 Tape Drive with mkdev Finding Existing Scsi Controllers Devices Configuring for LinuxYou may see output similar to For Irix 6.4/6.5 Configuring for SGI IrixConfiguring for HP-UX ConfigurationHardware/Driver Unix Settings Configuring for HP-UX Unix Settings Configuring for HP-UX Installation Best Practices 7Troubleshooting GuideDo Not Troubleshooting Suggestions Desktop tape drive Internal tape driveWindows Operating System Tape will not Load into Tape Drive Problems with Tape Drive and Cartridge Red Hat LinuxTroubleshooting Guide Troubleshooting Suggestions Tape will not Eject from the Drive Backup Failures OVERWRITTEN. ALL Previously Written Data on the Tape will Miscellaneous TapeAlert Messages Tape is Write ProtectedLTO-3 Tape Drive User’s Guide Slow Backups Troubleshooting Guide Troubleshooting Suggestions Index Intelligent 37 Data integrity Scsi ID Tape drive not recognized by operating system or application