Hp XP P9500 Storage User Manual Page 16
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Table 1 General system requirements (continued)
RequirementItem
When both systems are P9500, you can use multiple path groups. This is done by
registering path groups with multiple path group IDs in the same storage system.
But note that only one path group can be specified for a mirror. Up to eight paths
can be registered in one path group.
Groups of logical paths, which allows you to configure or change the configuration
of multiple paths at the same time.
Path group
• A maximum of eight logical paths can be registered in a path group
• A maximum of 64 path groups can be set in a storage system.
• The following Hexadecimal values can be set as the path group ID:
◦ 0-255 when connected to P9500
◦ 0 only when connected to XP24000/XP20000 Disk Array, XP12000 Disk
Array, or XP10000 Disk Array
• For a mirror, the same path group ID must be used to connect the primary
storage system to the secondary system as is used to connect the systems in the
reverse direction.
• The path group is specified during the create pair operation. It cannot be
changed by the resync pair or swap operation.
• Path groups can be created and specified using RAID Manager. See
configuration setting commands in HP XP P9000 RAID Manager User Guide
and sample configuration definition files in HP XP P9000 RAID Manager
Installation and Configuration User Guide.
• It is recommended that you specify different paths and path groups for Cnt Ac-S
and Cnt Ac-J secondary systems when using CU Free.
Volumes
• A P-VOL may be copied to one S-VOL.
• P-VOL and S-VOL must be equal in size.
• P-VOL and S-VOL must be of same emulation type.
• The maximum volume size of P-VOL and S-VOL is 4,194,304.000 MB
(8,589,934,592 blocks). However, when XP12000 Disk Array or XP10000
Disk Array is used as the primary or secondary system, the maximum volume
size is 2,949,120.00 MB (6,039,797,760 blocks).
• The minimum volume size of P-VOL and S-VOL is 26.875MB (96,000 blocks).
• When Cnt Ac-S is cascaded with Cnt Ac-J, a data volume may be copied to
multiple data centers.
Limited per P9500 system. See “Maximum number of pairs allowed ” (page 23).Maximum number of pairs
Supported RAID groups
• RAID1, RAID5, and RAID6 are supported for both data and journal volumes.
• RAID1, RAID5, and RAID6 can co-exist in the same journal.
Virtual LUN:Supported volume types
• Can be used for data and journal volumes.
• S-VOL capacity must equal P-VOL capacity.
Cache Residency:
• Data volume: yes
• Journal volume: no
LUN Expansion
Must be operable for primary and secondary systems to ensure pair creation
success. The remote system cache must be configured to adequately support Cnt
Cache and nonvolatile storage
(NVS)
Ac-J remote-copy workloads, as well as local workload activity. In general, increase
16 Requirements and specifications
- 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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