Hp XP P9500 Storage Manuel d'utilisateur Page 58
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System behavior
Note the following behaviors for suspended pairs:
• The primary system stops performing update operations to the S-VOL. It may or may not
continue accepting write I/Os to the P-VOL depending on the P-VOL fence level setting.
• If an update fails, the primary system maintains exact synchronization by reporting a unit
check and de-committing the P-VOL update. This ensures that both the host system and
application program regard the write operation to the P-VOL as failed.
• If the primary system accepts subsequent write I/Os for a suspended P-VOL, the system records
the updated data in the P-VOL tracks as differential data. When a suspended pair is
resynchronized, the primary system copies the out of sync P-VOL tracks to the S-VOL as
differential data.
Export pair information
Use the Export function to save pair information to a CSV file.
An example of an exported text file follows. The fields are described in the table.
(2) Group number and host group name(1) Port number in the local storage system
(4) LDKC, CU, and LDEV numbers in the local storage system(3) LU number in the local storage system
(6) Serial number of the paired storage system(5) Pair status
(8) Port number of the paired volume(7) CU SSID or Path Group ID of the paired system
(10) LU number of the paired volume(9) GID of the paired volume
(12) Pair type(11) LDKC, CU, and LDEV numbers of the paired system
(14) Differential data setting(13) Fence level
(16) Copy priority(15) Consistency group number
(18) Quorum disk ID(17) Synchronization of pair volumes
(20) CLPR number and name(19) Volume access status
• A device ID ending in # (for example, 00:00:3C #) indicates the LDEV is an external volume.
For more information, see the HP P9000 External Storage for Open and Mainframe Systems
User Guide.
• A device ID ending in X (for example, 00:00:3C X) indicates the LDEV is a Thin Provisioning
virtual volume. For more information, see the HP P9000 Provisioning for Open Systems User
Guide.
58 Monitoring and maintenance
- Abstract 1
- Contents 3
- 4 Contents 4
- Contents 5 5
- Typical components 7
- Storage systems 7
- Volume pairs 8
- Data path 9
- Consistency groups 9
- Interfaces 14
- Failover software 14
- Initial copy 15
- Update copy 15
- System requirements 16
- Preparing P9500 systems 18
- Planning volume pairs 20
- Planning I/O to the S-VOL 21
- Managing differential data 21
- Synchronous 22
- 16,384Base (16KLDEV, SI/VM) 22
- Planning volume pairs 23 23
- Planning data paths 25
- 3 km4 Gbps 26
- 1.5 km8 Gbps 26
- Planning ports 27
- Planning consistency groups 28
- Host failover software 30
- Continuous Access Journal 32
- Business Copy 33
- LUN Expansion 35
- Virtual LVI/LUN 35
- Cache Residency 35
- LUN Manager 36
- Thin Provisioning 36
- Performance Monitor 36
- Auto LUN 37
- Data Retention 37
- Thin Provisioning Z 38
- Data Retention 39 39
- 5 Configuration operations 40
- 42 Configuration operations 42
- • When CU Free is selected 43
- 44 Configuration operations 44
- 48 Configuration operations 48
- 6 Pair operations 49
- 50 Pair operations 50
- Split pairs 51
- Resynchronize pairs 52
- Release pairs 53
- Change fence level 54
- 7 Monitoring and maintenance 55
- Pair status definitions 56
- Split and suspend types 57
- Export pair information 58
- Monitor copy operations, I/O 59
- Select data to be graphed 60
- Resize graph, save data 61
- Delete logical paths 62
- RCU maintenance 63
- General information 64
- Miscellaneous maintenance 65
- Media maintenance 66
- 8 Data migration 67
- Disaster recovery overview 68
- Analyze S-VOL currency 69
- 10 Troubleshooting 72
- Error codes and messages 76
- Pinned track recovery 83
- Contacting HP 84
- Related information 84
- Typographic conventions 85
- Pair Operation window 88
- Paircreate dialog box 93
- Pairsplit-r dialog box 94
- Pairresync dialog box 94
- Pairsplit-S dialog box 95
- Change Pair Option dialog box 95
- Display Filter dialog box 96
- RCU Operation window 97
- RCU Status dialog box 101
- Add RCU dialog box 103
- RCU Option dialog box 104
- Add Path dialog box 105
- Add SSID dialog box 105
- Usage Monitor window 106
- History window 107
- Export operations history 108
- History window notes 108
- System Option window 109
- Glossary 110
- 112 Index 112
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