Using CM to check tape integrity | HP LTO 4 FC, LTO 4 SCSI guide

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HP LTO 4 FC Using CM to check tape integrity, Behavior with a missing or inconsistent EOD value, Unique media identifier

Contents

volume 2 software integration LTO 4 FC, SCSI and SAS drivesHP LTO Ultrium tape drives technical reference manual HP restricted Legal and notice information Contents 1 Designing backup applications2 Configuration and initialization 3 Use of tapes 5 Supporting Ultrium features 4 Factors affecting performance 6 Sense keys and codes 7 Exception handling HP restricted Related documents Documentation mapDocuments specific to HP Ultrium drives Drives-general Installation and configuration OperationCartridges Interface Maintenance and troubleshooting Dealing with errors LTO Ultrium features General documents and standardization 1 Designing backup applications Non-immediate commandsOptimizing performance Large data transfer size Cleaning tape heads Managing the use of tapesInformation in Cartridge Memory Monitoring tape use Design goals for LTO backup applications Diagnostic logsTapeAlert Displaying drive information Include 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 18 Configuration and initialization Using Cartridge Memory attributes Using MODE SENSE3 Use of tapes LTO cartridge memory Tape status and capacity Finding the remaining capacityInterpreting Log Sense data Using the SET CAPACITY command Command descriptor blockCDB fields Changes to SCSI commands WORM mediaHow WORM media works New additional sense codes and TapeAlert flags Error Usage page ERASE commands rejectedSET CAPACITY command Re-writing media labels Using CM to check tape integrity Behavior with a missing or inconsistent EOD valueUnique media identifier Responding to Cartridge Memory data Load countBarcode support RWW retry counts Corrective action 4 Factors affecting performance Ways of optimizing performanceDetecting the drive’s speed Ensuring the recommended minimum transfer sizes Using Cartridge Memory instead of tape headers Using the Performance Log page for diagnosing problemsTime-out values Media type identification Recommended support of log pages Factors affecting performanceHost-related factors Example Recommendationwhere possible or a reasonably sized RAID system. More disks means makes sense to split heavily used FC cards across separate PCI busses Drive-related factors Do not interleave write commands with other commands, such as READ Format-related factors Page 34 Factors affecting performance 5 Supporting Ultrium features Cartridge Memory LTO-CMAutomation interface Further information Automation/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 New features in ACI Backward compatibility SCSI command Encryption support Further details Supporting the ACI protocolRecommended ACI time-out values 42 Supporting Ultrium features Recommended power-up sequence Treatment of reserved fields Recommended load-unload configuration Firmware upgrade via tape Recommended Get Drive Status polling frequencyACI protocol communications retry Upgrading the drive firmware Firmware upgrade via the primary host interface Firmware upgrade via ACILibrary firmware upgrade via tape Handling irregular cartridges Cleaning cartridge HP-configured or Universal Expired cleaning cartridge HP-configured or UniversalNon-HP Ultrium 1 cleaning cartridge Unreadable data cartridge Valid firmware upgrade cartridge Data cartridge with unreadable CMCartridge fails to seat or load Cartridge cannot be loaded Frequently asked questions CleaningInvalid firmware upgrade cartridge Is there separate firmware for drives intended to go into libraries? Backup software Resetting drivesResetting via the ACI Reset command Resetting using the ACIRSTL line Accessing Cartridge Memory without threading the tape Controlling data compressionOther mode page information Buffer size at EW-EOM Rewind on reset Write delay timePartition size 52 Supporting Ultrium features 6 Sense keys and codes Sense keys-actions to takeAction Console Message “3h-MEDIUM ERROR” on page 62 . Also see the Media Access For additional sense codes, see “3h-MEDIUM ERROR” onlog the error, terminate I/O to the drive, and pass the appropriate error to the calling application Action Console MessageAction Console Message page Additional sense codes-actions to take PhysicalEnd-of-Tape reached, unable to fit 0h-NO SENSE 1h-RECOVERED ERROR 2h-NOT READY The software must issue a LOAD before media access LUN not accessible, port inThe command cannot be executed because the specified 60 Sense keys and codes mechanism tests are being executed. When the tests are 3h-MEDIUM ERROR A READ , SPACE , WRITE or WRITE FILEMARKS command62 Sense keys and codes Send a console message that an unrecovered error on and the drive. Based on this, ask the user to clean the 64 Sense keys and codes Send a message to the console indicating that there is The current command such as READ, SPACE, REWIND 66 Sense keys and codes 4h-HW ERROR 5h-ILLEGAL REQUEST A MODE SELECT parameter list sent to the drive contains68 Sense keys and codes 6h-UNIT ATTENTION persistent reservation using the PERSISTENT RESERVE OUTallowed to execute. In other words, some commands can 32 initiators to register, using PERSISTENT RESERVE OUT Action service action removed all reservations and the persistent A PERSISTENT RESERVE OUT command was executedWRITE BUFFER or MAINTENANCE OUT command A SET DEVICE IDENTIFIER command has been successful 7h-DATA PROTECTION Code 8h-BLANK CHECK Bh-ABORTED COMMAND READ BUFFER commandrelated to a missing EOD data set. The most likely cause Dh-VOLUME OVERFLOW A WRITE or WRITE FILEMARKS command has encountered76 Sense keys and codes Typical escalation procedure 1. Retrieve fault information3. Allow the user to try recovery 4. Allow the user to reset devices Monitoring the condition of the drive and media Supporting TapeAlert Flags TypePage Page Page Page Page Page Page Designing software to use the TapeAlert log TapeAlert models Reading the TapeAlert log TapeAlert polling usage modelTapeAlert informational exception usage model One-Button Disaster Recovery OBDR Responding to the ‘Clean’ LEDSupporting OBDR Providing pass-through mode Requirements for drivers and logical device managers Glossary see ”read-while-write” Index Page Page HP restricted