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Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide
Battery Hysteresis
When charging a battery, write-back caching will be allowed as long as a previous
down time has not drained more than 50 percent of a battery’s capacity. When a
battery is operating below 50 percent capacity, the battery is considered to be low, and
write-back caching is disabled.
CAUTION: Compaq recommends that you replace the ECB every two
years to prevent battery failure.
NOTE: If a UPS is used for backup power, the controller does not check the battery.
See “SET controller,” page 7–91 for information about the CACHE_UPS and
NOCACHE_UPS switches.
- First Edition (April, 1999) 1
- Compaq Computer Corporation 1
- Contents 3
- Chapter 2 4
- Chapter 3 4
- Chapter 4 5
- Chapter 5 6
- Chapter 6 7
- Chapter 7 8
- System Profiles 10
- Controller Specifications 10
- Glossary 10
- About This Guide 15
- Precautions 16
- Maintenance Port Precautions 17
- FCC Precautions 17
- Conventions 18
- Typographical Conventions 19
- Special Notices 20
- Related Publications 21
- About This Guide 22
- Revision History 23
- General Description 25
- General Description 26
- CXO6841A 27
- Summary of HSG80 Features 29
- Controller Components 32
- Cabling (Continued) 33
- Operator Control Panel 35
- Maintenance Port 36
- Utilities and Exercisers 36
- Virtual Terminal Display 37
- Disk Inline Exerciser 37
- Configuration Utility 37
- Clone Utility 38
- Field Replacement Utility 38
- Device Statistics Utility 38
- Cache Module 39
- External Cache Battery 41
- Charging Diagnostics 42
- Battery Hysteresis 43
- Controller and Host Concepts 45
- Terminology 46
- Item Description 47
- ➀ Other controller 47
- ➁ This controller 47
- Selecting a Failover Mode 49
- Shared Port IDs 50
- Separate Port IDs 51
- Preferring the Host Path 52
- Caching Techniques 53
- Write-Through Caching 54
- Write-Back Caching 54
- Nonvolatile Memory 55
- Chapter 3 63
- Bus Dynamics 64
- Host Bus 65
- Controller Device Bus 65
- Containers and Storagesets 66
- Containers 67
- Addressing 68
- Disk 10000 71
- Disk 20000 Disk 30000 71
- Failover Mode 72
- CXO6454B 74
- Assigning Unit Offsets 75
- Assigning Access Paths 76
- (Node IDs) 77
- Planning Storagesets 81
- Disk drives 83
- Choosing a Storageset Type 88
- CXO5507A 89
- ➀ First member of Mirrorset 1 95
- ➁ First member of Mirrorset 2 95
- Availability 96
- I/O Request 97
- Performance and Availability 99
- Stripeset 100
- Cloning Data for Backup 101
- Planning Storagesets 102
- SAVE_CONFIGURATION 107
- INITIALIZE 107
- INITIALIZE DISK 107
- Creating a Storageset Map 110
- Spare spare Spare R1 111
- R2 R2 R2 R2 111
- Spare Spare Spare Spare 111
- M1 M1 M2 M2 111
- Planning Partitions 114
- Disk Drives 115
- Enabling Switches 116
- Changing Switches 116
- RAIDset Switches 117
- Membership 118
- Mirrorset Switches 119
- Read Source 120
- Device Switches 121
- Device Transfer Rate 122
- Initialize Switches 123
- Increasing the Request Rate 124
- CXO-5172A-MC 125
- Save Configuration 126
- Configurations 128
- Destroy/Nodestroy 129
- Chapter 5 131
- Introduction 133
- Controller 134
- Maintenance and Service Guide 136
- RUN FRUTIL 137
- SHOW THIS_CONTROLLER FULL 137
- Using Two Switches 138
- Switches 138
- Using One Switch 140
- IDENTIFIER 151
- Optional Steps 159
- Extended Subsystem 160
- Setting a Port Offline 161
- Backing Up Power with a UPS 161
- CXO6476B 164
- Shutting Down Your Subsystem 166
- Restarting Your Subsystem 167
- Configuring Storagesets 169
- Unit Switches 170
- Adding Disk Drives 171
- Formatting Disk Drives 171
- Configuring Storagesets 172
- Configuring a Stripeset 174
- Configuring a Mirrorset 175
- Configuring a RAIDset 176
- RAIDset-name switch 177
- RAIDset-name 177
- Enabling Autospare 185
- Deleting a Storageset 186
- Changing Device Switches 187
- Changing Initialize Switches 188
- Changing Unit Switches 188
- Finding the CCL Location 190
- SCSI-2 and SCSI-3 Modes 190
- Multiple-Bus Failover 191
- Transparent Failover 191
- SCSI-2 Mode 192
- SCSI-3 Mode 192
- Moving Storagesets 193
- Name Storageset Uses Used by 195
- CLI Commands 197
- CLI Overview 198
- Command Overview 199
- Getting Help 199
- Entering CLI Commands 200
- Changing the CLI Prompt 201
- Command Syntax 201
- ADD CONNECTIONS 202
- CLI Commands 204
- Examples 205
- See also 205
- ADD DISK 206
- ADD MIRRORSET 209
- ADD RAIDSET 213
- ADD REMOTE_COPY_SETS 217
- ADD SPARESET 219
- ADD STRIPESET 220
- ADD UNIT 223
- CLEAR_ERRORS CLI 231
- CLEAR_ERRORS 232
- INVALID_CACHE 232
- UNKNOWN 235
- LOST_DATA 236
- UNWRITEABLE_DATA 238
- CONFIGURATION RESET 240
- CONFIGURATION RESTORE 241
- CONFIGURATION SAVE 243
- CREATE_PARTITION 244
- Parameters 247
- DELETE FAILEDSET 251
- DELETE SPARESET 252
- Parameter 253
- DESTROY_PARTITION 254
- DIRECTORY 256
- LOCATE D102 265
- LOCATE DISKS 265
- LOCATE CANCEL 265
- POWEROFF 270
- RESTART 277
- RETRY_ERRORS UNWRITEABLE_DATA 279
- SELFTEST 283
- Table 7–4. SET 288
- Switches 288
- Switches (Continued) 289
- SET FAILEDSET 302
- SET FAILOVER 304
- SET MULTIBUS_FAILOVER 311
- SET NOFAILOVER 313
- SET NOMULTIBUS_FAILOVER 315
- Table 7–6 SET 323
- SHOW MIRR1 333
- EMU CABINET SETTINGS 335
- FANSPEED AUTOMATIC 335
- SHUTDOWN 336
- UNMIRROR 338
- Device Profile 340
- Storageset Profile 341
- Enclosure Template 342
- Environmental Specifications 345
- B–4 Controller Specifications 346
- GL–2 Glossary 348
- See also 349
- GL–4 Glossary 350
- GL–6 Glossary 352
- GL–8 Glossary 354
- GL–10 Glossary 356
- GL–12 Glossary 358
- GL–14 Glossary 360
- GL–16 Glossary 362
- GL–18 Glossary 364
- GL–20 Glossary 366
- GL–22 Glossary 368
- GL–24 Glossary 370
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