Seagate Scorpion 24 STD624000N Manuals

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Seagate Scorpion 24 STD624000N Product Manual

Seagate Scorpion 24 STD624000N Product Manual (112 pages)

Scorpion 24 DDS-3 Tape Drive

Brand: Seagate | Category: Storage | Size: 0.69 MB

Table of Contents

Fcc Notice
5
About this Manual
6
Table of Contents
7
1 Introduction

13
- Overview
  13
  - DDS Format Standard Compatibility
    13
  - Scorpion 24 Capacity and Transfer Rates
    14
- Features
  15
- Models
  16
- Figure 1. 3.5-Inch Internal DDS Drive
  17
- Figure 2. 5.25-Inch Internal DDS Drive
  17
- DAT Technology Overview
  18
  - Helical Scan Recording
    18
  - Figure 3. External DDS Drive
    18
  - Recording Formats
    19
    
    DDS-3 Recording Format
    19
    
    DDS Recording Format
    19
    
    DDS-DC Recording Format
    20
2 Specifications

21
3 Installation

27
4 Drive Operations

45
5 SCSI Interface

55
6 DDS-3 Tape Format

59
- Introduction to DDS Recording Format Standards
  59
  - Basic Groups
    60
  - Figure 23. Structure of a Basic Group
    60
  - Entities
    61
  - Subgroups
    61
  - Basic Group Transformation Summary
    61
  - Subcode Information
    61
  - Subcode Location
    61
  - DDS-3 Track Geometry
    62
  - Figure 24. Track Configuration
    62
  - Recorded Patterns
    63
  - Format of a Track
    63
  - Positioning Accuracy
    64
  - Timing Tracking
    64
- Tape Layouts in the DDS-3 Standard
  65
- Layout of a Single Data Space Tape (Single Partition)
  65
  - Figure 25. Timing Tracking
    65
  - Device Area
    66
  - Figure 26. Layout of a Single Data Space Tape
    66
  - Reference Area
    66
  - Appending to Tape
    67
  - Data Area
    67
  - Figure 27. Appending Rules
    67
  - System Area
    67
  - Figure 28. Tolerance on Seamless Appending
    68
  - Early Warning Point (EWP)
    69
  - EOD Area
    69
  - Initialization
    69
- Layout of a Partitioned Tape
  70
  - Figure 29. Layout of a Partitioned Tape
    70
  - Initialization of Partitioned Tapes
    71
  - Partition 0
    71
  - Partition 1
    71
- Housekeeping Frames
  72
- DDS-3 Recording Format Standard-Further Reference
  72
7 Data Compression

73
- Introduction
  73
- Data Compression-General
  73
  - Data Compression Considerations
    74
  - Hardware Compression
    75
  - Data Integrity
    75
- DCLZ Algorithm
  76
- Scsi/Data-Compression Chip
  80
  - Overview
    80
  - Features
    80
  - Figure 30. Layout of Scsi/Data Compression Device
    81
8 Theory of Operations

83
- Overview
  83
- Motors and Control Circuits
  88
  - Figure 34. Alternate Azimuth Angles
    88
  - Read and Write LSI
    89
  - SCSI Controller
    89
  - Timing Tracking Circuitry
    89
- Flash Memory
  89
- Sensors
  90
- Read-After-Write
  90
- Media Recognition System (MRS)
  91
- DDS Data Cartridge
  91
- Figure 35. DDS Cartridge
  92
- Figure 36. Cartridge Design Features
  93
- Figure 37. Write-Protect Tab on the DDS Cartridge
  93
9 Maintenance and Reliability

95
- Maintenance
  95
- Reliability
  97
  - Mean Time between Failures
    97
  - Mean Time to Repair
    97
Acronyms and Measurements

99
- Acronyms and Abbreviations
  99
- Measurements
  101
- A Acronyms and Measurements
  102
Vendor-Unique SCSI Information

103
Glossary

107

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