Hp XP P9500 Storage User Manual Page 135
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Table 8 Volume types that can be shared with Cnt Ac-J (continued)
Used as Cnt Ac-J
journal volume?
Used as Cnt Ac-J
S-VOL?
Used as Cnt Ac-J
P-VOL?
Volumes types and functions
1. The volume can be used as a Cnt Ac-J pair volume for delta resync.
2. Cnt Ac-J pair must be created first, otherwise No.
3. For information on Auto LUN, contact HP Technical Support .
4. Cnt Ac-J pair status must be other than COPY or PAIR to use the P-VOL as a source volume and perform volume
migration. The migration operation stops if Cnt Ac-J pair status changes to COPY or PAIR.
5. The volume can be used as an S-VOL only when you restore a Cnt Ac-J pair or perform the horctakeover operation,
though even in these cases, it cannot be used in a pair for a delta resync operation
6. The volume cannot be used as the Cnt Ac-J P-VOL if the specified journal was registered when 2DC Cascade was
enabled.
7. A volume shared by two Cnt Ac-J pairs in the 3 Cnt Ac-J DC multi-target or cascade configuration cannot be used
for this function. Also, a volume that is already used for this function cannot be shared by two Cnt Ac-J pairs.
The following topics clarify key information regarding shared volumes.
NOTE: Continuous Access Synchronous and Business Copy volumes are used extensively with
Continuous Access Journal. See “Configurations with Continuous Access Synchronous” (page 141)
and “Configurations with Business Copy” (page 154) for more information.
Cache Residency
You can perform Cache Residency operations on a Continuous Access Journal pair’s P-VOL and
S-VOL.
Data Retention
You can create a Continuous Access Journal pair using volumes that have been assigned the access
attribute by the Data Retention. However, you cannot specify a volume with the "S-VOL Disable"
attribute as a Continuous Access Journal S-VOL.
The following table shows whether the access attribute can be changed or referenced.
Table 9 Cnt Ac-J pair status and Data Ret operations
Data Ret access attribute
referenced?
Data Ret access attribute changed?Cnt Ac-J pair statusCnt Ac-J
volume
YesYesSMPLP-VOL
YesSee next table.COPY
YesSee next table.PAIR
YesYesPSUS
YesYesPSUE
YesYesSMPLS-VOL
YesNoCOPY
YesNoPAIR
YesNoPSUS
YesNoPSUE
The following table shows when changes can be made to the access attribute when the Continuous
Access Journal P-VOL status is PAIR or COPY.
Cache Residency 135
- 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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