Hp XP P9500 Storage User Manual Page 129
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- Table of contents
- TROUBLESHOOTING
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1. Set up Cnt Ac-J at the primary, intermediate, and remote sites and configure ports. See:
“Configuring local and remote systems for Cnt Ac-J ” (page 45)
“Defining fibre-channel port attributes ” (page 44)
2. Configure Cnt Ac-J journals in the three sites. When you register a journal, CAJ 3DC is
automatically enabled in the Edit Journal Volumes dialog box. This setting allows registration
of two MUs in a journal, as required for the intermediate S-VOL/P-VOL. See “Registering
journal volumes in a journal ” (page 50) for more information about registering journals.
NOTE: The Edit Journal Volumes dialog box setting, CAJ 3DC, cannot be changed in the
dialog box. To disable, it is necessary to delete the journal, disable the setting, and then
register the journal again.
3. Create the pair in the first mirror, from the primary to the intermediate site. Specify a value
from 0 to 3 as the Mirror ID.
4. When pair status becomes PAIR, create the pair in the second mirror, from the intermediate
to the remote site. Specify the secondary journal and S-VOL used in the first mirror as the
primary journal and P-VOL of the new pair.
Select a Mirror ID from 0 to 3, though not the one used for the local site pair.
Make sure pair status changes to PAIR before proceeding.
5. (Optional) Create a delta resync pair using the P-VOL in the local site mirror and the existing
S-VOL in the remote site mirror.
Select a Mirror ID from 0 to 3, though not those used in the other two mirrors in the
configuration.
6. Assign remote command devices to the following:
• Local site’s primary-intermediate pair mirror ID
• Local site’s delta resync pair mirror ID
• Intermediate site’s primary-intermediate pair mirror ID
• Intermediate site’s intermediate-remote pair mirror ID
• Remote site’s intermediate-remote pair mirror ID
• Remote site’s delta resync pair mirror ID
3 Cnt Ac-J DC multi-target configuration
In a multi-target configuration, data is copied from the local site to two remote sites.
The benefit of this configuration is that it provides a third copy of the data, helping to insure that
business can continue in the event of a failure at the other two sites.
You can also create a delta resync pair from one remote site S-VOL to the other remote site S-VOL.
Once created, the delta resync pair remains split unless the S-VOL is needed for disaster recovery.
3 Cnt Ac-J DC multi-target configuration 129
- 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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