Primary Conductor | Exabyte EXB-8505 8mm specification

4Requirements for Use

Primary Conductor

A minimum primary conductor size of 28 AWG is recommended to minimize noise effects and ensure proper distribution of terminator power.

SCSI Cable Connector Requirements

The SCSI connector is located at the back of the tape drive, as shown in Figure 4-5. The connector is a 50-pin male ribbon cable connector. The stub length within the tape drive is less than 50 mm.

Figure 4-5SCSI connector location on the back panel

To connect the tape drive to the SCSI bus, use a 50-pin female ribbon cable connector (AMP No. 1-746285-0 or equivalent).

Table 4-1shows the connector pin assignments for differential tape drives; Table 4-2shows the connector pin assignments for single-ended tape drives.

4-8	EXB-8205 and EXB-8505	510504
	(Standard and XL)

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Exabyte EXB-8505 8mm manual Primary Conductor, Scsi Cable Connector Requirements

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 Features Recording FormatFunctional Description Functional Specifications Interface Specifications Tables About This Manual Intended AudienceHow This Manual is Organized Related Publications EXB-8205 and EXB-8505 8mm Cartridge Tape SubsystemsLibraries and Enclosures Conventions Used in This Specification Standards Xiv Features Features Features 1Comparison of the four tape drives Features 1Comparison of tape drive features Read/Write Compatibility with Other Tape DrivesSupported Formats Data format features Data Compression Determining the Tape Format Custom Eeprom Options Storage Capacity Length Approximate Capacity to Leot a in MBytes8500c Format 8200c Compressed Format b EXB-8505 EXB-8505XL Front Panel Controls and Indicators Physical DescriptionDoor and Bezel Unload Button LEDsLabels Scsi Connector Power ConnectorBack Panel Components Ground Tab and Grounding Hole Resistor Terminators single-ended configuration only Scsi ID Jumper BlockMonitor 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 Related Products Integration with Other Exabyte 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 Blocks Logical Block CompressionLogical 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 Filemarks Long Filemarks2Type and size of filemarks for each format Setmarks EXB-8505 and EXB-8505XL only End of Data EODShort 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 Write Operations Data Flow and Data CompressionFunctional Description Logical Block CRC Streaming and Start/Stop Modes Data Compression Monitoring Thresholds During a Write Operation Motion ThresholdReconnect 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 Installation Requirements Requirements for Setting the Scsi IDRequirements for Use Requirements for Mounting the Tape Drive 2Mounting holes on the sides 4Mounting hole dimensions in inches and millimeters Terminators for Single-Ended Configuration Terminators for Differential ConfigurationRequirements for Scsi Bus Termination Requirements for Connecting a Scsi Cable ImpedanceCable 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 Resetting the Tape Drive Effect of PREVENT/ALLOW Medium Removal CommandError During Unload Procedure Preventive Maintenance Using Scsi CommandsCleaning 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 Scsi Commands 2SCSI-2 command setCommand OP Code Description Receive Diagnostic Using Scsi Commands Writing DataReading Data Erasing Data Searching for Data Copying MicrocodeInquiring 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 Drum Rotation Period Tape Tension Release and Drum Motion Suspension5Drum rotation periods Reselection Phase Timeout Data transfer ratesType Transfer 8500c a 8500 a 8200c Reliability Specifications Service LifeMachine Reliability Mean Time Between Failures Mtbf Test Conditions Conditions for the Mtbf Value Data Integrity Restrictions for the Mtbf Value Data Reliability Conditions for Data ReliabilityRestrictions for Data Reliability Write Reliability Read Reliability Power Specifications 7Power specifications for standard voltagesVoltages Power Connector 8Power connector pin assignmentsPin Number Assignment Grounding Hole and Ground Tab 2Chassis ground location on back panel Environmental Specifications 9Environmental specifications 10Temperature and humidity specifications Point Temperature HumidityOperating Environment Air Flow Requirements Particulate Contamination Limits11Particle contamination limits Shock Specifications 12Shock specifications Vibration Specifications 13Vibration specificationsRandom vibrationa applied during operation Random vibrationb applied during non-operationcand storaged Operating mode Acoustic Noise14Acoustic noise limits Safety and Regulatory Agency Compliance Safety Agency Standards Safety and Regulatory Agency ComplianceElectrostatic 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