Hp XP P9500 Storage User Manual Page 3
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- Table of contents
- TROUBLESHOOTING
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Contents
1 Continuous Access Journal overview ............................................................8
Continuous Access Journal software ...........................................................................................8
How Continuous Access Journal works........................................................................................8
Hardware and software components...........................................................................................9
P9500 storage systems.......................................................................................................10
Main and remote control units .......................................................................................10
Pair volumes......................................................................................................................11
Journal volumes.................................................................................................................11
Journals............................................................................................................................11
Data path.........................................................................................................................12
Consistency groups and journals..........................................................................................12
Remote Web Console ........................................................................................................12
RAID Manager (RAID Manager)..........................................................................................12
Reference Information..............................................................................................................12
Overview of copy operations...............................................................................................12
Initial copy operation ....................................................................................................12
Update copy operation..................................................................................................13
Read and write I/O during remote copy...............................................................................13
Differential data management..............................................................................................13
S-VOL write option.............................................................................................................14
Pair status.........................................................................................................................14
2 Requirements and specifications.................................................................15
System requirements................................................................................................................15
3 Planning volumes, P9500 systems...............................................................18
Plan and design workflow .......................................................................................................18
Assessing business requirements for data recovery .....................................................................18
Determining your RPO .......................................................................................................19
Write-workload .....................................................................................................................19
Measuring write-workload...................................................................................................19
Sizing journal volumes ...........................................................................................................20
Planning journals ...................................................................................................................20
Data transfer speed considerations ..........................................................................................21
RAID group configuration ...................................................................................................21
Fibre-channel port configuration...........................................................................................21
Planning journal volumes ........................................................................................................22
Planning pair volumes ............................................................................................................22
Maximum number of pairs allowed .....................................................................................23
Calculating maximum number of pairs.............................................................................23
Maximum initial copy operations and priorities......................................................................24
Disaster recovery considerations ..............................................................................................25
Host failover software ........................................................................................................25
Sharing volumes with other P9500 software volumes...................................................................26
Planning Cnt Ac-J in multiple P9500s using a consistency group...................................................26
Multiple journals per RAID Manager consistency group .........................................................27
3DC configurations using 3 Cnt Ac-J sites..............................................................................29
Planning for previous models ...................................................................................................29
Guidelines for preparing systems for Cnt Ac-J ............................................................................30
System option modes .........................................................................................................31
4 Planning the data path..............................................................................34
Data path design workflow .....................................................................................................34
Contents 3
- User Guide 1
- Contents 3
- 4 Contents 4
- Contents 5 5
- 6 Contents 6
- Contents 7 7
- P9500 storage systems 10
- Pair volumes 11
- Journal volumes 11
- Journals 11
- Reference Information 12
- Differential data management 13
- S-VOL write option 14
- Pair status 14
- System requirements 15
- Plan and design workflow 18
- Write-workload 19
- Sizing journal volumes 20
- Planning journals 20
- RAID group configuration 21
- Planning journal volumes 22
- Planning pair volumes 22
- Planning pair volumes 23 23
- Host failover software 25
- Planning for previous models 29
- System option modes 31
- 4 Planning the data path 34
- Calculating bandwidth 35
- 36 Planning the data path 36
- Sizing bandwidth 37 37
- 38 Planning the data path 38
- Packet loss 39
- Example configuration 40
- Port types 40
- Additional switches 41
- 42 Planning the data path 42
- 5 Configuration operations 44
- 46 Configuration operations 46
- 48 Configuration operations 48
- 50 Configuration operations 50
- 52 Configuration operations 52
- 6 Pair operations 54
- Creating the initial copy 55 55
- 56 Pair operations 56
- Creating the initial copy 57 57
- Splitting pairs 58
- Splitting mirrors 59
- Creating point-in-time copies 60
- Resynchronizing pairs 60
- Resynchronizing pairs 61 61
- Resynchronizing mirrors 62
- Deleting pairs 62
- Deleting pairs 63 63
- Deleting pairs in a mirror 64
- Deleting pairs in a mirror 65 65
- 7 Monitoring the system 66
- PSUS types and behaviors 69
- PSUE types and behaviors 71
- Selecting data to be graphed 74
- Manipulating graph, save data 76
- History of pair operations 79
- 8 Maintaining the system 80
- ◦ Initial 81
- ◦ Stopped 81
- ◦ Hold(Failure) 81
- 82 Maintaining the system 82
- 84 Maintaining the system 84
- Logical path maintenance 86
- Deleting logical paths 87
- When power stops unexpectedly 88
- 90 Maintaining the system 90
- General recovery procedures 91
- Cnt Ac-J secondary site: HOLD 100
- 10 Troubleshooting 103
- Troubleshooting logical paths 105
- B9E2, B9E4, D004 109
- B9E4, D004 112
- Miscellaneous troubleshooting 121
- 122 Troubleshooting 122
- Contacting HP 123
- Related information 123
- Typographic conventions 124
- Overview 126
- Failure recovery 127
- B Sharing volumes 133
- Cache Residency 135
- Data Retention 135
- Thin Provisioning 136
- LUN Expansion 137
- LUN Manager 137
- Fast Snap and Snapshot 137
- 138 Sharing volumes 138
- Virtual LUN 139
- Auto LUN 140
- 3DC cascade configuration 141
- Delta resync configuration 144
- ◦ Use the same mirror ID 146
- Problems that can occur 148
- ◦ Assign it to other mirrors 149
- ◦ Use it with RAID Manager 149
- 2 Data center configuration 151
- Pair status and data currency 156
- E GUI reference 157
- Journal Detail window 159
- Pair Operation window 165
- Paircreate dialog box 169
- Pairsplit-r dialog box 171
- Pairresync dialog box 172
- Pairsplit-S dialog box 173
- Change Pair Option dialog box 174
- Display Filter dialog box 174
- DKC Operation window 175
- Remote systems information 176
- Logical Path Information 177
- DKC Status dialog box 179
- Add DKC dialog box 180
- DKC Option dialog box 181
- Usage Monitor window 182
- History window 183
- Operations in History window 184
- History window notes 185
- Optional Operation window 186
- Glossary 188
- 190 Index 190
- 192 Index 192
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