Hp XP P9500 Storage User Manual Page 22
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- TROUBLESHOOTING
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Please see “Planning ports for data transfer ” (page 39) for a full discussion on the type and number
of fibre-channel ports required for your system.
Planning journal volumes
In addition to sizing journal volumes, you should be aware of the following requirements and
restrictions.
• Journal volumes must be registered in a journal before the initial pair-copy operation is
performed.
• Journal volumes must be registered on both the local and remote systems.
• Emulation type for journal volumes must be OPEN-V.
• Journal volumes should be sized according to RPO and write-workload. See “Sizing journal
volumes ” (page 20) for more information.
• If a path is defined from a host to a volume, the volume cannot be registered as a journal
volume.
• Journal volumes in a journal can have different capacities.
• A master journal volume and the corresponding restore journal volume can have different
capacities.
• A data volume and its associated journal volume can belong to only one journal.
• Do not register a volume to a journal during quick formatting. Doing so stalls the operation.
• Data volumes and journal volumes in the same journal must belong to the same controller.
• The number of journal volumes in the master journal does not have to be equal to the number
of volumes in the restore journal.
• Journal volumes consist of two areas: One area is used for storing journal data, and the other
area is used for storing metadata for remote copy.
• Journal volumes support all RAID configurations and physical volumes that are supported by
P9500.
• Journal volume capacity is not included in accounting capacity.
• Customized volumes can be used for journal volumes.
See the following for more information about journals and journal volumes:
• The “Journals” item in “System requirements” (page 15)
• “Planning journals ” (page 20)
Planning pair volumes
The following information can help you prepare volumes for configuration. Also, see system
requirements and specifications in “Requirements and specifications” (page 15) for more information.
• The emulation and capacity for the S-VOL must be the same as for the P-VOL
• When the S-VOL is connected to the same host as the P-VOL, the S-VOL must be defined to
remain offline.
• You can create a Cnt Ac-J pair using a Continuous Access Synchronous initial copy, which
takes less time. To do this, system option 474 must be set on the primary and secondary
systems. Also, a script is required to perform this operation. For more on system option 474
and how to do this operation, see “System option modes ” (page 31).
• Cnt Ac-J supports the LUN Expansion feature, which allows you to configure a LUSE volume
by using 2 to 36 sequential LDEVs. If two LUSE volumes are assigned to a Cnt Ac-J pair, the
capacity and configuration of the Cnt Ac-J S-VOL must be the same as the Cnt Ac-J P-VOL. For
22 Planning volumes, P9500 systems
- 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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