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HP LTO 4 FC, LTO 4 SCSI, LTO 4 SAS manual

Models: LTO 4 SCSI

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HP LTO Ultrium 4 drives technical reference manual, volume 2: software integration 33 HP restricted

Page 33

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HP LTO 4 FC, LTO 4 SCSI, LTO 4 SAS manual

Contents

LTO 4 FC, SCSI and SAS drives volume 2 software integrationHP LTO Ultrium tape drives technical reference manual HP restrictedLegal and notice information HP restricted1 Designing backup applications Contents2 Configuration and initialization 3 Use of tapes4 Factors affecting performance 5 Supporting Ultrium features7 Exception handling 6 Sense keys and codesHP restricted Documentation map Related documentsDocuments specific to HP Ultrium drives Drives-generalOperation Installation and configurationCartridges InterfaceDealing with errors Maintenance and troubleshootingGeneral documents and standardization LTO Ultrium featuresNon-immediate commands 1 Designing backup applicationsOptimizing performance Large data transfer sizeManaging the use of tapes Cleaning tape headsInformation in Cartridge Memory Monitoring tape useDiagnostic logs Design goals for LTO backup applicationsTapeAlert Displaying drive informationInclude the capability to download firmware 2 Configuration and initialization Inquiry string recoveryOperating system drivers Example 16 Configuration and initializationSCSI protocol, regardless of transport or interface type Support for additional LUN Enabling additional LUN supportSupporting additional LUNs HP restricted 18 Configuration and initializationUsing MODE SENSE Using Cartridge Memory attributes3 Use of tapes LTO cartridge memoryTape status and capacity Finding the remaining capacityInterpreting Log Sense data Using the SET CAPACITY command Command descriptor blockCDB fields WORM media Changes to SCSI commandsHow WORM media works New additional sense codes and TapeAlert flagsERASE commands rejected Error Usage pageSET CAPACITY command Re-writing media labelsUsing CM to check tape integrity Behavior with a missing or inconsistent EOD valueUnique media identifier Responding to Cartridge Memory data Load countBarcode support Corrective action RWW retry countsWays of optimizing performance 4 Factors affecting performanceDetecting the drive’s speed Ensuring the recommended minimum transfer sizesUsing the Performance Log page for diagnosing problems Using Cartridge Memory instead of tape headersTime-out values Media type identificationRecommended support of log pages Factors affecting performanceHost-related factors Recommendation Examplewhere possible or a reasonably sized RAID system. More disks means RecommendationDo not interleave write commands with other commands, such as READ Drive-related factorsRecommendation RecommendationRecommendation Format-related factorsRecommendation RecommendationPage HP restricted 34 Factors affecting performanceCartridge Memory LTO-CM 5 Supporting Ultrium featuresAutomation interface Further informationAutomation/Device Interface ADI Automation Control Interface ACI Modes of usage through ACISlave to a library controller ACI command set ACI commands that affect drive streaming performanceSCSI pass-through mode Backward compatibility New features in ACISCSI command Encryption support Supporting the ACI protocol Further detailsRecommended ACI time-out values 42 Supporting Ultrium featuresTreatment of reserved fields Recommended power-up sequenceRecommended load-unload configuration Recommended Get Drive Status polling frequency Firmware upgrade via tapeACI protocol communications retry Upgrading the drive firmwareFirmware upgrade via ACI Firmware upgrade via the primary host interfaceLibrary firmware upgrade via tape Handling irregular cartridgesExpired cleaning cartridge HP-configured or Universal Cleaning cartridge HP-configured or UniversalNon-HP Ultrium 1 cleaning cartridge Unreadable data cartridgeData cartridge with unreadable CM Valid firmware upgrade cartridgeCartridge fails to seat or load Cartridge cannot be loadedCleaning Frequently asked questionsInvalid firmware upgrade cartridge Is there separate firmware for drives intended to go into libraries?Resetting drives Backup softwareResetting via the ACI Reset command Resetting using the ACIRSTL lineAccessing Cartridge Memory without threading the tape Other mode page informationControlling data compression Buffer size at EW-EOMRewind on reset Write delay timePartition size 52 Supporting Ultrium featuresSense keys-actions to take 6 Sense keys and codesAction Console MessageFor additional sense codes, see “3h-MEDIUM ERROR” on “3h-MEDIUM ERROR” on page 62 . Also see the Media Accesslog the error, terminate I/O to the drive, and pass the appropriate error to the calling applicationConsole Message ActionAction Console MessageAction pageConsole Message pagePhysical Additional sense codes-actions to takeEnd-of-Tape reached, unable to fitAction 0h-NO SENSEAction Action2h-NOT READY 1h-RECOVERED ERRORAction ActionLUN not accessible, port in The software must issue a LOAD before media accessThe command cannot be executed because the specified ActionAction mechanism tests are being executed. When the tests areAction ActionA READ , SPACE , WRITE or WRITE FILEMARKS command 3h-MEDIUM ERRORAction Actionand the drive. Based on this, ask the user to clean the Send a console message that an unrecovered error onAction ActionAction ActionAction ActionAction ActionAction Send a message to the console indicating that there isAction The current command such as READ, SPACE, REWINDAction ActionAction 4h-HW ERRORAction ActionA MODE SELECT parameter list sent to the drive contains 5h-ILLEGAL REQUESTAction Actionpersistent reservation using the PERSISTENT RESERVE OUT 6h-UNIT ATTENTIONallowed to execute. In other words, some commands can 32 initiators to register, using PERSISTENT RESERVE OUTAction ActionAction ActionA PERSISTENT RESERVE OUT command was executed service action removed all reservations and the persistentWRITE BUFFER or MAINTENANCE OUT command A SET DEVICE IDENTIFIER command has been successfulAction 7h-DATA PROTECTIONAction ActionAction CodeAction ActionAction 8h-BLANK CHECKAction ActionREAD BUFFER command Bh-ABORTED COMMANDAction ActionDh-VOLUME OVERFLOW A WRITE or WRITE FILEMARKS command has encountered76 Sense keys and codes 1. Retrieve fault information Typical escalation procedure3. Allow the user to try recovery 4. Allow the user to reset devicesSupporting TapeAlert Monitoring the condition of the drive and mediaType FlagsPage Page Page Page Page Page Page TapeAlert models Designing software to use the TapeAlert logReading the TapeAlert log TapeAlert polling usage modelTapeAlert informational exception usage model One-Button Disaster Recovery OBDR Responding to the ‘Clean’ LEDSupporting OBDR Requirements for drivers and logical device managers Providing pass-through modeGlossary see ”read-while-write” Index Page Page HP restricted