Compaq AlphaServer DS20 Service Manual Page 4
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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Chapter 3 Error Registers
3.1 Ibox Status Register - I_STAT..................................................................3-2
3.2 Memory Management Status Register – MM_STAT.................................3-3
3.3 Dcache Status Register – DC_STAT.........................................................3-5
3.4 Cbox Read Register..................................................................................3-7
3.5 Miscellaneous Register (MISC)................................................................3-9
3.6 Device Interrupt Request Register (DIRn, n=0,1) ....................................3-12
3.7 Pchip Error Register (PERROR).............................................................3-13
3.8 Failure Register......................................................................................3-16
3.9 Function Register ...................................................................................3-18
Chapter 4 Removal and Replacement
4.1 System Safety ..........................................................................................4-1
4.2 FRU List..................................................................................................4-2
4.3 System Access .........................................................................................4-6
4.4 CPU Removal and Replacement ...............................................................4-8
4.5 Memory Module Removal and Replacement ..................................4-10
4.6 System Board Removal and Replacement ...............................................4-12
4.7 PCI/ISA Option Removal and Replacement............................................4-14
4.8 Server Feature Module Removal and Replacement..................................4-16
4.9 Power Supply Removal and Replacement...............................................4-18
4.10 Power Harness Removal and Replacement..............................................4-20
4.11 Power Transition Module Removal and Replacement..............................4-22
4.12 Auxiliary Fan Removal and Replacement ...............................................4-24
4.13 System Fan Removal and Replacement...................................................4-26
4.14 Cover Interlock Removal and Replacement.............................................4-28
4.15 Operator Control Panel Removal and Replacement ................................4-30
4.16 CD-ROM Removal and Replacement .....................................................4-32
4.17 Floppy Removal and Replacement..........................................................4-34
4.18 SCSI Disk Removal and Replacement ....................................................4-36
4.19 StorageWorks Backplane Removal and Replacement..............................4-38
4.20 StorageWorks UltraSCSI Bus Extender Removal and Replacement.........4-40
Appendix A Halts, Console Commands, and Environment
Variables
A.1 Halt Button Functions..............................................................................A-2
A.2 Using the Halt Button..............................................................................A-3
A.3 Halt Assertion .........................................................................................A-4
A.4 Summary of SRM Console Commands....................................................A-6
A.5 Summary of SRM Environment Variables ...............................................A-8
A.6 Recording Environment Variables .........................................................A-10
- AlphaServer DS20 1
- Contents 3
- Chapter 3 Error Registers 4
- Appendix C Firmware Update 5
- Examples 5
- Intended Audience 9
- Document Structure 9
- Documentation Titles 10
- Information on the Internet 10
- System Overview 11
- Chapter 1 11
- System Enclosure 12
- PKW-0501-97 14
- System Consoles 16
- System Architecture 18
- CPU Types 20
- Figure 1-6 Memory Placement 22
- PK1488-98 24
- Example 1–1 Show Memory 25
- Interrupts 28
- Table 1-1 PCI Slot Numbering 31
- PK1410-99 32
- Table 1-2 Switchpack 2 33
- Table 1-3 Switchpack 3 33
- Server Feature Module 34
- 1.9.1 Power Control Logic 36
- PK1493-98 38
- Power Supply 40
- Power Up/Down Sequence 42
- Maintenance Bus (I 46
- Error State 47
- StorageWorks Drives 48
- System Overview 1-39 49
- Chapter 2 51
- Troubleshooting 51
- Testing an Entire System 59
- Other Useful Console Commands 61
- Troubleshooting with LEDs 62
- Compaq Analyze 64
- Continued on next page 67
- Table 2-2 Types of Errors 69
- Releasing Secure Mode 70
- Chapter 3 71
- Error Registers 71
- Ibox Status Register - I_STAT 72
- MM_STAT 73
- PK1416-99 75
- Cbox Read Register 77
- Miscellaneous Register (MISC) 79
- PK1418-99 82
- Pchip Error Register (PERROR) 83
- Failure Register 86
- Table 3-8 Failure Register 87
- Function Register 88
- Table 3-9 Function Register 89
- Chapter 4 91
- Removal and Replacement 91
- FRU List 92
- System Access 96
- CPU Removal and Replacement 98
- Figure 4-4 Removing Memory 100
- System Board 102
- Slot Cover 104
- Option Card 104
- Replacement 106
- PK1404-99 110
- PK1481 - 9 114
- Module Guides 116
- PKW0519A-97 118
- ➊ in Figure 119
- Replacement 120
- Figure 4-15 Removing CD-ROM 122
- PK1401-98 124
- PKW0501B-97 126
- PK1412-99 130
- Appendix A 133
- Halts, Console Commands, and 133
- Environment Variables 133
- Halt Button Functions 134
- Using the Halt Button 135
- Halt Assertion 136
- Appendix B 145
- Managing the System Remotely 145
- RCM Overview 146
- First-Time Setup 147
- ➊ in Example 148
- RCM Commands 149
- Using the RCM Switchpack 154
- Troubleshooting Guide 157
- Appendix C 159
- Firmware Update 159
- PK1461-98 160
- Diskettes 166
- Update 168
- (Continued) 170
- Internal Floppy Disk 171
- C.1.5 LFU Commands 176
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