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76270-901

HUNTER
Performance Specification
MAY 1979

o Century Data Sr~~~
RECORD OF REVISIONS
REVISION NOTES
o ORIGINAL ISSUE

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CONTENTS

Section Page Section Page

1 INTRODUCTION ................. " 1-1 6 TRIDENT INTERFACE SIGNALS ..... 6-1
1.1 Purpose ........................... 1-1 6.1 All Signals Except Data and Clock .. .. 6-1
1.2 Related Documents . . . . . . . . . . . . . . . .. 1-1 6.2 Read/Write Data and Clock .......... 6-1
1.3 General Description ................. 1-1 6.3 Interface Cables and Connectors ...... 6-1
1.4 Features. . . . . . . . . . . . . . . .. . . . . . . . . .. 1-1 6.4 Interface Cable Assemblies Available From
Century Data Systems (CDS) ...... 6-1
2 SPECIFICATIONS .................. 2-1 6.4.1 Bussed Cable (Signal Cable) .......... 6-4
2.1 Operational Specifications . . . . . . . . . .. 2-1 6.4.2 Radial Cable ........................ 6-4
2.2 Reliability . . . . . . . . . . . . . . . . . . . . . . . . .. 2-2 6.4.3 Bus Cable (Dual Access Only) ........ 6-6
2.2.1 MTFB - Mean Time Between Failures 2-2 6.5 Grounding .......................... 6-6
2.2.2 MTTR - Mean Time to Repair ...... , 2-2
2.2.3 Preventive Maintenance Time . . . . . . .. 2-2
2.2.4 Service Life ........................ 2-2 7 SMD INTERFACE SiGNALS ......... 7-1
2.2.5 Cost of Ownership . . . . . . . . . . . . . . . . .. 2-2 7.1 Disk Drive Interface Signals .......... 7-1
2.2.6 Power Loss . . . . . . . . . . . . . . . . . . . . . . .. 2-2 7.2 Tag 3 (Control Tag) Interpretations . 7-4
2.3 Data Integrity ...................... 2-2 7.2.1 Bus 0 - Write Gate ................. 7-4
2.3.1 Recoverable Read Error Rate ......... 2-2 7.2.2 Bus 1 - Read Gate ................. 7-4
2.3.2 Non-Recoverable Read Error Rate ..... 2-2 7.2.3 Bus 2 - Servo Offset Forward ....... 7-4
2.3.3 Positioning Errors ................... 2-2 7.2.4 Bus 3 - Servo Offset Reverse ....... 7-4
2.4 Media ............................. 2-2 7.2.5 Bus 4 - Fault Clear ................. 7-4
7.2.6 Bus 5 - Address Mark Enable ....... 7-4
3 FORMAT REQUiREMENTS .......... 3-1 7.2.7 Bus 6 - Return to Zero (RTZ) ........ 7-4
3.1 General ............................ 3-1 7.2.8 Bus 7 - Data Strobe Early ........... 7-4
3.2 Electronic Sectoring ................. 3-1 7.2.9 Bus 8 - Data Strobe Late ........... 7-4
3.2.1 Format A . . . . . . . . . . . . . . . . . . . . . . . . .. 3-1 7.2.10 Bus 9 - Release/Priority Select
3.2.3 Format B . . . . . . . . . . . . . . . . . . . . . . . . .. 3-1 (Dual Access Only) ................ 7-4
3.3 Address Mark Sectoring ............. 3-2
3.3.1 Format C .......................... 3-2 8 SMD INTERFACE DESCRiPTION ..... 8-1
3.3.2 Format 0 .......................... 3-2 8.1 General ............................ 8-1
3.3.3 Format E . . . . . . . . . . . . . . . . . . . . . . . . .. 3-3 8.2 Power Sequencing .................. 8-1
3.3.4 Format F .. . . . . . . . . . . . . . . . . . . . . . . .. 3-3 8.3 Positioning ........................ , 8-1
3.4 Track 10 Field ...................... 3-3 8.4 Data Handling ...................... 8-1
8.5 Data Error Correction ................ 8-1
4 TRIDENT INTERFACE SiGNALS ..... 4-1 8.6 Status Indication ................... 8-1
4.1 Disk Drive Interface Signals .......... 4-1 8.7 Recovery Times . . . . . . . . . . . . . . . . . . .. 8-1
4.2 Bus Interpretation ................... 4-5
4.2.1 Set Cylinder Tag .................... 4-5 9 SMD INTERFACE SIGNAL LEVELS ... 9-1
4.2.2 Set Head Tag ...................... 4-5 9.1 Bussed or Signal Cable .............. 9-1
4.2.3 Control Tag . . . . . . . . . . . . . . . . . . . . . . .. 4-5 9.2 Radial or Data Cable . . . . . . . . . . . . . . .. 9-1
9.3 Recommended Line Receivers
5 TRIDENT INTERFACE DESCRIPTION. 5-1 and Drivers . . . . . . . . . . . . . . . . . . . . .. 9-1
5.1 General ............................ 5-1 9.4 Mating Connectors .................. 9-1
5.2 Power Sequencing .................. 5-1
5.3 Positioning ......................... 5-1 10 DUAL ACCESS OPTION ........... 10-1
5.4 Data Handling ...................... 5-4 10.1 General ........................... 10-1
5.5 Error Correction .................... 5-4 10.2 Unit Selection
5.6 Diagnostic Aids ..................... 5-1 (Both Access Enabled) ........... 10-1
5.6.1 Device Check . . . . . . . . . . . . . . . . . . . . .. 5-1 10.3 Removal from Reverse Status ....... 10-1
5.6.2 Recover Times . . . . . . . . . . . . . . . . . . . .. 5-1 10.3.1 Reverse Timer ..................... 10-1

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Section Page Section Page

10.4 Priority Select 11.3.4 Error Reset Selection ....... , .... ; ., 11-2
(Bus 9 + Unit Select) ........... , 10-1 11.3.5 Model Straps, ..................... 11-2

11 CONTROLS & INDiCATORS ........ 11-1 12 ENVIRONMENTAL
11.1 Front Panel .................. ; ... , 11-1 CHARACTERISTICS ~ ............ 12-1
11.1.1 Start Switch ., . . . . . . . ... . . . . . . . . .. 11-1 12.1 General ..................... , ..... 12-1
11.1.2 Cartridge Protect . . . . . . . . . . . . . . . . .. 11-1 12.2 Temperature ................ ; ..... 12-1
11.1.3 Fixed Protect ...................... 11-1 12.3 Humidity ...................... '" 12-1
11.1.4 Fault Clear .................... " .. 11-1 12.4 Altitude .......................... 12-1
11.1.5 Start Indicator; .................... 11-1 12.5 Heat Dissipation ............ " ..... 12~1
11.1.6 1.0. Plug (SMDlnterface Hunter 12.6 Vibration ......................... 12-1
Only) ........................... 11-2 12.7 Shock ............................ 12-1
11.2 Rear Panel . . . . . . . . . . . . . . . . . . . . . . .. 11-2 12.8 Dust Control .............. '" . . . .. 12-1
11.2.1 Circuit/ Brea.ker . . . . . . . . . . . . . . . . . . .. 11.2
11.3 Internal ........................... 11-2 13 POWER REQUIREMENTS .......... 13-1
11.3.1 Degate Switch .. . . . . . . . . . . . . . . . . .. 11-2 13.1 ACPower ........................ 13~1
11.3.2 Servo Disable . . . . . . . . . . . . . . . . . . . .. 11-2 13.2 DC Power .