Hp XP P9500 Storage User Manual Page 153
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• If a Cnt Ac-J pair is suspended when the Cnt Ac-S S-VOL is in PAIR or COPY status, the Cnt
Ac-S pair becomes suspended by error.
• A Cnt Ac-J pair cannot be released if cascaded with a Cnt Ac-S pair. To release a Cnt Ac-J
pair, first release the Cnt Ac-S pair, then release the Cnt Ac-J pair.
Specifications and restrictions for Continuous Access Synchronous pair operations
• Specify a volume for the Cnt Ac-S P-VOL that is not used in a Cnt Ac-J pair In the 2DC
configuration, use the journal that was registered when 2DC Cascade was enabled.
• The Cnt Ac-J P-VOL that is specified for the Cnt Ac-S S-VOL must be in PAIR status. The only
available differential management unit is tracks.
• To re-synchronize the Cnt Ac-S pair, the Cnt Ac-J P-VOL must be in PAIR status.
• You cannot use the takeover command on the Cnt Ac-S S-VOL when suspending the Cnt Ac-S
pair.
• If you release the Cnt Ac-S pair when the Cnt Ac-J P-VOL is in COPY status, the Cnt Ac-J pair
becomes suspended by error.
• For Cnt Ac-J, an X at the end of the device ID indicates the LDEV is a Thin Provisioning virtual
volume. However, the X does not display when both of the following conditions exist:
◦ The Cnt Ac-S S-VOL is a Thin Provisioning virtual volume.
◦ The Cnt Ac-J S-VOL is not a Thin Provisioning virtual volume.
Procedure for a 2DC configuration
Procedure 43 To set up a 2DC configuration
1. Install and set up Cnt Ac-S and Cnt Ac-J on the required systems.
2. When registering the journal on the intermediate site, set 2DC Cascade to Enable in the Edit
Journal Volumes dialog box.
3. Create the Cnt Ac-J pair on the intermediate system.
4. When Cnt Ac-J pair status is PAIR, create the Cnt Ac-S pair on the primary system. See HP
P9000 Continuous Access Synchronous User Guide.
5. Confirm that Cnt Ac-S pair status becomes PAIR.
2 Data center configuration 153
- 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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