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Chapter 6 Troubleshooting Guide

Understanding LED Sequences

66 LTO-4 (Model B) Half-Height Tape Drive User’s Guide

Understanding LED Sequences

As shown in figure 17, the LTO-4 (Model B) Half-Height Tape Drive front

panel display has four LED indicators that reflect the operating

condition of the drive:

The LEDs are either on steady or blinking at different rates in various

combinations to indicate the various drive conditions as shown in

table 10

Figure 17 Front Panel Display

Cartridge door

Ready LED

Tap e L ED Dri v e LE DClean LED

Eject button

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 97 98

LTO-4 (Model B) 1
Contents 3
Chapter 3 Operation 25 4
Chapter 4 Theory 35 4
Chapter 5 Specifications 43 4
Index 81 6
Standards Conformance 13
(Corporate Headquarters) 14
Technical Publications 15
Quantum Home Page 15
Getting More 15
Information or Help 15
Worldwide End-User 16
Product Warranty 16
Introduction 17
Drive Models 18
Features 19
Chapter 1 Introduction 20
Installation Procedures 21
Handling Precautions 22
Guidelines 22
Preinstallation 23
Requirements 23
Ta p e D r i v e 24
Configuring the 25
Internal Parallel SCSI 25
Ta p e Drive 25
ID Configuration Jumper Pins 26
Bus Termination Examples 27
Mounting the Internal 28
Connecting the Internal 29
Drive Interface and DC 29
Power Cables 29
DC power connector 30
68-pin SCSI cable 30
29-pin SFF-8482 SAS connector 30
Restarting the Internal 31
Tape Drive System 31
Tabletop Parallel SCSI 33
Connecting the 34
Tabletop Drive Interface 34
AC power connector 35
AC power switch 35
Restarting the Tabletop 38
Drive System 38
Operation 41
Chapter 3 Operation 42
Table 2 Front Panel Display 44
LED Blink Codes 44
Using LTO Tape Cartridges 46
Write Protecting a Tape 47
Cartridge 47
Tape Cartridge Care and 48
Maintenance 48
Cleaning the Tape Drive 49
Chapter 4 51
Track Layout 51
Chapter 4 Theory 52
Recording Method 53
Data Buffer 53
Data Integrity 53
Error-correction Code 54
Data Compression 55
Considerations 56
Intelligent Data 57
Compression 57
Specifications 59
TO CARTRIDGE CENTER 60
FROM BOTTOM MOUNTING SURFACE 60
FROM SIDE MOUNTING SURFACE 60
Power Specifications 61
Chapter 5 Specifications 62
Table 5 Power Dissipation 62
Table 6 Drive Performance 63
Environmental Requirements 64
Injected Noise Specifications 65
Reliability Specifications 65
Mean Time Between 66
Failures 66
LTO Cartridge Specifications 67
Troubleshooting Guide 69
Troubleshooting Suggestions 70
Computer Hardware 71
Does Not Recognize the 71
Computer Software 72
Does Not Recognized 72
Slow Backup 73
Operations 73
Failed Operations 76
TapeAlert Messages 76
Understanding LED Sequences 82
Table 10 Tape Drive LED 83
Sequences 83
Installation Checklists 87
Appendix B 91
Equipment 91
Appendix C 93
Regulatory Compliances 93
Safety Compliances 93

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