Hp XP P9500 Storage User Manual Page 69
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S-VOL accessP-VOL
access
DescriptionRAID Manager statusRWC status
status of the pair to HOLD, update the data in the primary system after the recovery from the condition of the differential data
discarding.
If you cannot connect to the secondary site of Cnt Ac-S due to failures or disasters, the transition from HOLDING to HOLD is
not performed correctly.
5. In RAID Manager, the suspend status of the pair displays instead of HOLD/HOLDING/HLDE. If you run the delta resync
operation, the pair status of the last pair may display (PSUE, PFUS or SSWS).
6. P-VOL write access by the host is allowed, except when it belongs to a journal registered in the 2DC cascade configuration.
Additional information on pair status
• When a pair is split by the user or suspended by the system, the primary system notifies the
host(s) with a service information message (SIM). If SNMP is installed and operational for
P9500, this SIM results in an SNMP trap indicating the reason for suspension.
• Transitional states occur when a request is accepted to change pair status to PSUS, PSUE, or
SMPL, but is not yet complete. Transition states are not reported to the host.
• The user or the primary or secondary systems can initiate the PSUS/PSUE status change.
• Only the user can delete a pair.
• When you perform an operation, the system reports final status at the end of the operation.
• If an error causes the status to change to PSUE, the status is reported at the beginning of the
transition.
• A pair in Flush mode (remaining local update data is flushing to the secondary system) remains
in Suspending or Deleting status until data in the master and restore journals is the same and
the pair is completely split or released. To calculate the time during which the pair remains
in Suspending or Deleting status, use the following equation:
C x (u / 100) x 1,024 / V (The unit is seconds)
where:
◦ C is total capacity (MB) of the master journal volume.
◦ u is the usage rate of data (%) in the master journal volume.
◦ V is data transfer speed (MB/sec) between the primary and the secondary systems.
See “Usage Monitor window ” (page 182) for instructions on viewing the usage rate of a journal
volume.
• When pair status is COPY, neither cache nor shared memory can be added to or removed
from the system. When either tasks is to be performed, split any pairs in COPY, status, then
resynchronize when the cache or shared memory operation is completed.
PSUS types and behaviors
The PSUS status can be set by the user or the system, from the primary or secondary systems.
DescriptionVolume PSUS type applies
to
PSUS type
The user split the pair from the primary or secondary system,
using the S-VOL-writeoption.
P-VOL, S-VOLPSUS, S-VOL by Operator
Monitoring pair activity and status 69
- 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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