Hp XP P9500 Storage User Manual Page 62
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Resynchronizing mirrors
When you resynchronize a mirror, all the pairs with the mirror ID are re-synchronized.
Use this procedure also to perform the delta resync operation on all pairs in a mirror or to change
pair status of all pairs in the mirror from Hold(Failure) to Hold.
Prerequisite information
This operation must be performed from the primary system only.
The following additional information may be useful to you before beginning the procedure:
• Remote Web Console does not support multiple primary and secondary systems in a Cnt Ac-J
system. In this case, use RAID Manager to restore a mirror.
• Use RAID Manager to restore a mirror that is in a RAID Manager consistency group containing
multiple journals.
• Resynchronizing a mirror when I/O load is low reduces impact on performance.
Procedure 11 To resynchronize a mirror
1. In the Remote Web Console main window, select Actions > Remote Copy > Continuous Access
Journal > Journal Operation.
2. Click to change the mode from View to Modify.
3. In the tree, expand Registered then select the LDKC.
4. In the list or mirrors in the right pane, right-click a pair that you want to resync, perform the
delta resync operation on, or to change the status from Hold(Failure) to Hold, then select Mirror
> Pairresync > and one of the following:
• Stopped to resynchronize the pairs in the mirror.
• Hold or Holding to perform the delta resync operation on all pairs in the mirror.
• Hold(Failure) to change the status of the mirror to Hold.
5. In the Pairsplit-r dialog box, click Set.
6. To resynchronizeresume other mirrors, repeat steps 2 through 5.
7. Review settings in the Preview list in the Journal Operation window.
To cancel a setting, right click the mirror and click Cancel.
8. Click Apply to restore the mirror(s).
Deleting pairs
When you delete a pair, the Cnt Ac-J relationship between the P-VOL and S-VOL is released. Only
the relationship is affected, the data volumes and their data remain.
Prerequisite information
• This operation can be performed from the primary or secondary system.
• When S-VOLs are physically attached to the same host as P-VOLs, take the S-VOLs offline
before releasing the pair. Doing this avoids confusion and possible error when the host is
restarted.
• When deleting pairs in a journal that is in a RAID Manager consistency group consisting of
multiple primary and secondary systems, make sure to select Mirror in the Range field. If you
select LU, make sure the pair is suspended; otherwise it will not be deleted.
The following additional information may be useful to you before beginning the procedure:
• When a pair deletion is initiated, differential data is transferred from S-VOL, the pair
relationship is deleted, and the volumes’ status becomes SMPL.
• A pair can be deleted regardless of its status. However, data consistency is not guaranteed
unless status is Paired.
62 Pair operations
- 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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