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7.10 SCSI Problems
SCSI problems are generally manifested as data corruption, boot
problems, or poor performance.
Check SCSI bus termination.
• Cable is properly seated at system board or option connector.
• Bus must be terminated at last device on cable or at physical cable end.
• No terminators in between.
• Old 50-pin (narrow) devices must be connected with wide-to-narrow adapter
(SN-PBXKP-BA). Do not cable from the connector on the card.
• Using 50-pin devices on the bus may significantly degrade performance.
Any external drives must be connected to their associated card, and these cards
must have no internal drives connected to them. Use a separate external
controller card.
• Ultra-wide SCSI has strict bus length requirements.
• SCSI bus itself cannot handle internal plus external cable.
• Use a separate card for external devices and terminate properly.
7-14 DS25 Owner’s Guide
- AlphaServer DS25 1
- Class B Equipment 2
- (Avis Canadien) 4
- European Union Notice 4
- Contents 5
- Chapter 5 Firmware 7
- Chapter 6 Remote Management 8
- Chapter 7 Troubleshooting 8
- Chapter 8 Specifications 9
- Figures 10
- Preface 13
- Documentation Titles 14
- Information on the Internet 14
- Chapter 1 15
- System Overview 15
- 1.1 System Enclosures 16
- Diagnostic LEDs 17
- Halt button with amber LED 17
- Reset button 17
- 1-4 DS25 Owner’s Guide 18
- 1.3 Rear Ports and Slots 20
- 1.4 Operator Control Panel 22
- 1.5 System Motherboard 24
- 1.6 PCI Slots 26
- 1.7 Power Supplies 28
- 1.8 Power Requirements 30
- 1.9 Removable Media Storage 31
- 1.10 Storage Subsystem 32
- Figure 1–11 System Keys 33
- 1.12 Console Terminal 34
- Chapter 2 35
- Operation 35
- 2.1 Powering Up the System 36
- 2.2 Power-Up Displays 38
- 2.2.1 RMC Power-Up Display 39
- 2.2.2 SROM Power-Up Display 39
- 2-6 DS25 Owner’s Guide 40
- 2-8 DS25 Owner’s Guide 42
- 2.3 SRM Console 44
- 2-12 DS25 Owner’s Guide 46
- Example 2–5 Show Boot* 47
- 2-14 DS25 Owner’s Guide 48
- Example 2–6 Show Config 49
- 2-16 DS25 Owner’s Guide 50
- Example 2–7 Show Device 52
- Category Description 53
- Hose 0, 1, 2, or 3 53
- Operation 2-19 53
- Example 2–8 Show Memory 54
- 2.6 Setting Console Security 56
- Example 2–9 Set Password 57
- 2-24 DS25 Owner’s Guide 58
- Example 2–10 Set Secure 59
- Example 2–11 Login 60
- 2-28 DS25 Owner’s Guide 62
- 2.7 Updating Firmware 63
- 2-30 DS25 Owner’s Guide 64
- 2.7.2 Manual Updates 66
- 2-34 DS25 Owner’s Guide 68
- 2-36 DS25 Owner’s Guide 70
- Chapter 3 71
- Booting and Installing 71
- 3.1 Setting Boot Options 72
- 3.1.1 auto_action 73
- 3.1.2 bootdef_dev 75
- 3.1.3 boot_file 76
- 3.1.4 boot_osflags 77
- 3.1.5 ex*0_inet_init 81
- 3.1.6 ex*_protocols 82
- 3.2 Booting Tru64 UNIX 83
- 3-14 DS25 Owner’s Guide 84
- Example 3–2 RIS Boot 86
- 3-18 DS25 Owner’s Guide 88
- 3.4 Booting Linux 90
- 3-22 DS25 Owner’s Guide 92
- 3.5 Booting OpenVMS 94
- 3-26 DS25 Owner’s Guide 96
- Chapter 4 99
- Configuring and Installing 99
- Components 99
- is at 103
- 4-6 DS25 Owner’s Guide 104
- 1. Open the front door 109
- 2. Loosen the thumbscrew 109
- CAT0028B 110
- CAT0033a 111
- 4.5 Memory Configuration 112
- Stacked DIMMs 113
- Unstacked DIMMs 113
- Figure 4–11 Memory Slots 114
- Figure 4–12 Removing DIMMs 115
- CAT0124A 116
- 4.6 CPU Configuration 117
- 4.7 Installing a PCI Option 119
- 4.7.1 PCI Configuration 120
- V @ >240VA 122
- MR0398B 125
- 4.9 Network Configuration 127
- 10 / 100 10 / 100/ 1000 128
- SC0119B 129
- 4.11.1 Drive Status LEDs 132
- 4.12 External SCSI Expansion 133
- Figure 4–24 External SCSI 134
- 4.13 Updating Firmware 135
- Chapter 5 139
- Firmware 139
- 5.1 SRM Console Overview 140
- 5.2 Command Summary 143
- 5.3 Getting Help 148
- Example 5–2 Show Config 150
- 6 Yukon PCI Hot-Plug C 151
- P00>>> 151
- Example 5–3 Show Dev 153
- Example 5–4 Show Memory 154
- Example 5–5 Show Power 155
- Example 5–6 Show Version 156
- Example 5–7 Show CPU 157
- Example 5–8 Show Pal 158
- 5.12 Testing the System 161
- 5.13.1 halt (or stop) 163
- 5.13.2 continue 163
- 5.14 Updating Firmware 165
- V6.3-2 167
- Confirm update on: 167
- [Y/(N)]y 167
- Example 5–14 Crash 168
- Example 5–15 Init 169
- 5.17 Reading a File 172
- Example 5–19 Set Password 177
- Example 5–20 Set Secure 179
- Example 5–21 Login 180
- P00>>> login 182
- 5.20.1 com*_baud 188
- 5.20.2 console 189
- 5.20.3 cpu_enabled 190
- 5.20.5 kbd_hardware_type 193
- 5.20.6 language 194
- 5.20.7 os_type 195
- 5.20.8 pci_parity 196
- 5.20.9 pk*0_fast 197
- 5.20.10 pk*0_host_id 198
- 5.20.11 pk*0_soft_term 199
- Examples 200
- 5-62 DS25 Owner’s Guide 200
- 5.20.12 tt_allow_login 201
- Chapter 6 203
- Remote Management 203
- 6.1 RMC Overview 204
- 6.2 Operating Modes 206
- 6.2.1 Bypass Modes 208
- 6-8 DS25 Owner’s Guide 210
- 6.3 Terminal Setup 211
- 6-10 DS25 Owner’s Guide 212
- 6.5 Entering the RMC 213
- 6-12 DS25 Owner’s Guide 214
- 6-14 DS25 Owner’s Guide 216
- 6-16 DS25 Owner’s Guide 218
- 6-18 DS25 Owner’s Guide 220
- 6-20 DS25 Owner’s Guide 222
- 6-22 DS25 Owner’s Guide 224
- 6-24 DS25 Owner’s Guide 226
- 6-26 DS25 Owner’s Guide 228
- Remote Management 6-27 229
- 6-28 DS25 Owner’s Guide 230
- 6.8 RMC Command Reference 231
- 6-30 DS25 Owner’s Guide 232
- 6-32 DS25 Owner’s Guide 234
- 6-34 DS25 Owner’s Guide 236
- 6-36 DS25 Owner’s Guide 238
- RMC> set com1_mode 239
- 6-38 DS25 Owner’s Guide 240
- 6-40 DS25 Owner’s Guide 242
- 6.9 Troubleshooting Tips 243
- 6-42 DS25 Owner’s Guide 244
- Chapter 7 245
- Troubleshooting 245
- 7.1 Error Beep Codes 246
- 7.2 Diagnostic LEDs on OCP 247
- 7-4 DS25 Owner’s Guide 248
- 7.3 Power Problems 250
- 7.5 Boot Problems 252
- 7-10 DS25 Owner’s Guide 254
- Symptom Action 255
- 7.8 Memory Problems 256
- 7.9 PCI Bus Problems 257
- 7.10 SCSI Problems 258
- 7-16 DS25 Owner’s Guide 260
- 7.11.3 Required Firmware 261
- 7.11.4 Updating Firmware 262
- Chapter 8 265
- Specifications 265
- 8.1 Physical Specifications 266
- Electromagnetic Immunity 270
- 8.4 Acoustical Data 271
- 8.5 Power Cord Requirements 272
- Index-1 275
- Index-2 276
- Index-3 277
- Index-4 278
- Index-5 279
- RMC, 6-41 280
- Index-6 280
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