510504 | Exabyte EXB-8505 8mm manual

2Recording Format

Figure 2-2Relationship of 8mm physical track structures to logical data formats

2-4	EXB-8205 and EXB-8505	510504
	(Standard and XL)

Image 40

Exabyte EXB-8505 8mm manual 510504

Contents

3URGXFW 6SHFLILFDWLRQ Copyright DisclaimerTrademark Notices Revision History Changes and Enhancements to This Manual May Product Warranty Caution Contents Requirements for Use Functional Description Safety and Regulatory Agency Compliance Glossary Index Recording Format FeaturesFunctional Description Functional Specifications Interface Specifications Tables Intended Audience About This ManualHow This Manual is Organized EXB-8205 and EXB-8505 8mm Cartridge Tape Subsystems Related PublicationsLibraries and Enclosures Conventions Used in This Specification Standards Xiv Features Features Features 1Comparison of the four tape drives Read/Write Compatibility with Other Tape Drives Features 1Comparison of tape drive featuresSupported Formats Data format features Data Compression Determining the Tape Format Custom Eeprom Options Length Approximate Capacity to Leot a in MBytes Storage Capacity8500c Format 8200c Compressed Format b EXB-8505 EXB-8505XL Physical Description Front Panel Controls and IndicatorsDoor and Bezel LEDs Unload ButtonLabels Scsi Connector Power ConnectorBack Panel Components Ground Tab and Grounding Hole Scsi ID Jumper Block Resistor Terminators single-ended configuration onlyMonitor Port Internal Components of the Tape Drive 5Internal components EXB-8505 shown Rotating Drum Assembly Tape Transport Mechanism Servo Card SSV Preamp and Upper Analog Cards Lower Digital SLD Card Size and Weight 7External dimensions in inches and millimeters Integration with Other Exabyte Products Related ProductsEXB-210 8mm Library 9Mini Tabletop CTSs with EXB-8505s installed Mini Tabletop Cartridge Tape Subsystem Exatapeô Data Cartridges Features 5EXATAPE media compatibility with 8mm tape drives Exabyte Cleaning Cartridges Recording Format Helical-Scan Recording Recording Format Physical Format Physical Track Structure 510504 8500/8500c Physical Track Structure 3Physical track structure for 8500 and 8500c format 8200c and 8200 Physical Track Structure 5Physical track structure for 8200c track format 510504 Physical Blocks Search Fields Servo Areas Recording Parameters 1Recording parameters Logical Format Supported Logical Formats Logical Block Compression Logical BlocksLogical Block Packing 9Logical block packing one physical block Gap Bytes 10Gap bytes one physical block Gap Blocks and Gap Tracks 11One gap block and one gap track in two physical tracks Long Filemarks Filemarks2Type and size of filemarks for each format End of Data EOD Setmarks EXB-8505 and EXB-8505XL onlyShort Filemarks Track and Block Counts 4Track and physical block counts for 8500 and 8500c formats Lbot to Leot Leot to PeotNumber of tracks Number of blocks Hex Decimal Functional Description Data Flow and Data Compression Write OperationsFunctional Description Logical Block CRC Streaming and Start/Stop Modes Data Compression Monitoring Motion Threshold Thresholds During a Write OperationReconnect Threshold Error Detection, Correction, and Recovery Procedures Error Correction Code ECCCyclic Redundancy Check CRC Read-After-Write Checking Read Operations 2Data flow during a read operation Thresholds During a Read Operation Requirements for Use Requirements for Setting the Scsi ID Installation RequirementsRequirements for Use Requirements for Mounting the Tape Drive 2Mounting holes on the sides 4Mounting hole dimensions in inches and millimeters Terminators for Differential Configuration Terminators for Single-Ended ConfigurationRequirements for Scsi Bus Termination Impedance Requirements for Connecting a Scsi CableCable Length Scsi Cable Connector Requirements Primary Conductor 1Connector pin assignments for differential tape drives Signal Pin Number Ground Termpwr Power-On Mode OperationTape Drive Controls Device States 6LEDs on the faceplate of the EXB-8505 and EXB-8505XL LKey for m3 LED states during operation Loading Data Cartridges Unloading Data Cartridges Load Time Effect of PREVENT/ALLOW Medium Removal Command Resetting the Tape DriveError During Unload Procedure Using Scsi Commands Preventive MaintenanceCleaning the Tape Drive Determining When the Tape Drive Needs Cleaning Time-to-Clean LED IndicationRequest Sense 03h Command Loading New Microcode 4Single pack and multi-pack shipping dimensions and weights Size Dimensions WeightShipping Requirements Shipping Cartons Unpacking and Packing Instructions Interface Specifications Scsi Features Interface SpecificationsPhysical Path Data Transfer Rate Scsi Messages 1SCSI messagesHex Value Description Out Initiator to 2SCSI-2 command set Scsi CommandsCommand OP Code Description Receive Diagnostic Using Scsi Commands Writing DataReading Data Erasing Data Copying Microcode Searching for DataInquiring About Tape Drive Status Performing Diagnostic Tests Setting Operating ParametersInquiry 12h Command LOG Sense 4Dh and LOG Select 4Ch Commands Functional Specifications Performance Specifications Write and Read Access TimesFunctional Specifications 1Typical write and read access times Tape Speed File-Search Tape Speed3File-search tape speeds EXB-8205 and EXB-8205XL EXB-8505 and EXB-8505XL Reposition Time Rewind Tape Speed4Typical rewind times Size Length Typical rewind time Exatape a Seconds Tape Tension Release and Drum Motion Suspension Drum Rotation Period5Drum rotation periods Reselection Phase Timeout Data transfer ratesType Transfer 8500c a 8500 a 8200c Service Life Reliability SpecificationsMachine Reliability Mean Time Between Failures Mtbf Test Conditions Conditions for the Mtbf Value Data Integrity Restrictions for the Mtbf Value Conditions for Data Reliability Data ReliabilityRestrictions for Data Reliability Write Reliability Read Reliability 7Power specifications for standard voltages Power SpecificationsVoltages 8Power connector pin assignments Power ConnectorPin Number Assignment Grounding Hole and Ground Tab 2Chassis ground location on back panel Environmental Specifications 9Environmental specifications Point Temperature Humidity 10Temperature and humidity specificationsOperating Environment Particulate Contamination Limits Air Flow Requirements11Particle contamination limits Shock Specifications 12Shock specifications Vibration Specifications 13Vibration specificationsRandom vibrationa applied during operation Random vibrationb applied during non-operationcand storaged Acoustic Noise Operating mode14Acoustic noise limits Safety and Regulatory Agency Compliance Safety and Regulatory Agency Compliance Safety Agency StandardsElectrostatic Discharge ESD Electromagnetic Compatibility EMC Radiated Susceptibility 510504 Glossary Glossary May Signal Driving a signal to the true state. assertion Index Index Mtbf Scsi 510504