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4.12 External SCSI Expansion
There are two ways to connect external SCSI devices, such as tabletop
or rackmount storage: (a) PCI-based SCSI adapters and (b) the embed-
ded SCSI controller that is accessed through its external bulkhead
connector
. See Figure 4-24.
SCSI Expansion Rules
Observe the following rules to determine if a particular device can be used:
• The device must be supported by the operating system. Consult the sup-
ported options list.
• Do not exceed the maximum number of devices supported on the SCSI con-
troller to be used.
• Each device on the bus must have a unique SCSI ID.
• The entire SCSI bus length, from terminator to terminator, must not exceed
the following limits:
Fast differential SCSI or Ultra SCSI HVD 25 meters
Fast single-ended SCSI 3 meters
Ultra-wide SCSI 1.5 meters
Ultra 2 SCSI LVD 12 meters
Ultra 3 SCSI 12 meters
• Ensure that the SCSI bus is properly terminated and that no devices in the
middle of the bus are terminated.
• For best performance, wide devices should be operated in wide SCSI mode.
Configuring and Installing Components 4-35
- 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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