Exabyte EXB-8505 8mm

Functional Description

This chapter describes the functional features of the EXB-8205,

EXB-8205XL, EXB-8505, and EXB-8505XL, including write and read

operations.

May 1994 EXB-8205 and EXB-8505 3-1

(Standard and XL)

Contents

Main Copyright Disclaimer Trademark Notices Revision History ii EXB-8205 and EXB-8505 Changes and Enhancements to This Manual Product Warranty Caution iv EXB-8205 and EXB-8505 Contents About This Manual xii 1 2 3 4 5 6 7 Glossary G-1 Index I-1 Figures Features Recording Format Functional Description Requirements for Use Page Tables Features Recording Format Requirements for Use Interface Specifications About This Manual Intended Audience How This Manual is Organized Related Publications EXB-8205 and EXB-8505 8mm Cartridge Tape Subsystems Libraries and Enclosures Standards # Conventions Used in This Specification Note: Page Page Features Note: # Page Read/Write Compatibility with Other Tape Drives Supported Formats Table1-2 Read/write compatibility of Exabyte 8mm tape drives 1Features Table1-3 Data format features May 1994 EXB-8205 and EXB-8505 1-5 Determining the Tape Format Data Compression Custom EEPROM Options Note: Storage Capacity Physical Description Front Panel Controls and Indicators Door and Bezel Unload Button LEDs Labels Back Panel Components Ground Tab and Grounding Hole SCSI Connector Power Connector SCSI ID Jumper Block Monitor Port Resistor Terminators (single-ended configuration only) Note: Internal Components of the Tape Drive Tape Transport Mechanism Rotating Drum Assembly Note: Servo Card (SSV) Preamp and Upper Analog Cards Lower Digital (SLD) Card Size and Weight Related Products Integration with Other Exabyte Products EXB-210 8mm Library Mini Tabletop Cartridge Tape Subsystem EXATAPEData Cartridges # Exabyte Cleaning Cartridges Note: Recording Format Helical-Scan Recording Physical Format Physical Track Structure Note: Page 8500/8500c Physical Track Structure 8200c and 8200 Physical Track Structure Page Page Physical Blocks Note: Search Fields Note: Servo Areas Note: Recording Parameters 2Recording Format Table2-1 Recording parameters May 1994 EXB-8205 and EXB-8505 2-11 Logical Format Supported Logical Formats Logical Blocks Logical Block Compression Note: Logical Block Packing Note: Page Gap Bytes Gap Blocks and Gap Tracks Filemarks Long Filemarks Short Filemarks Setmarks (EXB-8505 and EXB-8505XL only) EndofData(EOD) Track and Block Counts Page Page Write Operations Data Flow and Data Compression Note: Logical Block CRC Note: Streaming and Start/Stop Modes Note: Thresholds During a Write Operation Motion Threshold Reconnect Threshold Error Detection, Correction, and Recovery Procedures Error Correction Code (ECC) Cyclic Redundancy Check (CRC) Read-After-Write Checking Read Operations Thresholds During a Read Operation Motion Threshold Reconnect Threshold Requirements for Use Installation Requirements Requirements for Setting the SCSI ID Requirements for Mounting the Tape Drive Page Page Requirements for SCSI Bus Termination Terminators for Single-Ended Configuration Terminators for Differential Configuration Requirements for Connecting a SCSI Cable Impedance # Cable Length Primary Conductor SCSI Cable Connector Requirements Table4-1 Connector pin assignments for differential tape drives 4Requirements for Use May 1994 EXB-8205 and EXB-8505 4-9 Table4-2 Connector pin assignments for single-ended tape drives 4Requirements for Use 4-10 EXB-8205 and EXB-8505 510504 Operation Power-On Mode Tape Drive Controls Device States Page Page Note: Loading Data Cartridges # Notes: Load Time Unloading Data Cartridges Effect of PREVENT/ALLOW MEDIUM REMOVAL Command Error During Unload Procedure Resetting the Tape Drive Note: Using SCSI Commands Preventive Maintenance Cleaning the Tape Drive Determining When the Tape Drive Needs Cleaning Time-to-Clean LED Indication REQUEST SENSE (03h) Command Loading New Microcode Shipping Requirements Shipping Cartons Note: Unpacking and Packing Instructions Interface Specifications SCSI Features Data Transfer Rate Physical Path SCSI Messages SCSI Commands Note: May 1994 EXB-8205 and EXB-8505 5-5 5Interface Specifications Using SCSI Commands Writing Data Reading Data Erasing Data Searching for Data Copying Microcode Inquiring About Tape Drive Status REQUEST SENSE (03h) Command INQUIRY (12h) Command Performing Diagnostic Tests Setting Operating Parameters Page Performance Specifications Write and Read Access Times Note: Tape Speed File-Search Tape Speed 8500, 8500c, and 8200c Formats 8200 Format Rewind Tape Speed Reposition Time Drum Rotation Period Tape Tension Release and Drum Motion Suspension Data Transfer Rate Notes: Reselection Phase Timeout Reliability Specifications Service Life Machine Reliability: Mean Time Between Failures (MTBF) Test Conditions Conditions for the MTBF Value Restrictions for the MTBF Value Data Integrity Data Reliability Conditions for Data Reliability Restrictions for Data Reliability Write Reliability Bit error rate: Read Reliability Bit error rate: Power Specifications Voltages Power Connector Grounding Hole and Ground Tab Note: Environmental Specifications Operating Environment Air Flow Requirements Particulate Contamination Limits Shock Specifications Vibration Specifications 6Functional Specifications Table 6-13 Vibration specifications May 1994 EXB-8205 and EXB-8505 6-19 Acoustic Noise Page Safety Agency Standards Electrostatic Discharge (ESD) Note: Electromagnetic Compatibility (EMC) Radiated Susceptibility Page Glossary Page Page Page Index A B C D F Index G H I R Index S T U