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by different hosts. This guards against storage system failure as well as host failure. The RAID
Manager instances of separate hosts are connected via the LAN so that they can maintain
awareness of each other. Each RAID storage system has a command device that communicates
with each RAID Manager instance independently. Each storage system contains the primary
volumes of its connected RAID Manager instance and the secondary volumes of the other RAID
Manager instance (located on a different host in this case).
Host machines that can be paired
When you perform a pair operation, the version of RAID Manager should be the same on the
primary and secondary sites. As a particular application uses HORC, users sometimes use a HORC
volume as the data backup volume for the server. In this case, RAID Manager requires that the
RAID Manager instance correspond to each OS platform that is located on the secondary site for
the pair operation of data backup on the primary servers of each OS platform.
However, it is possible to prepare only one server at a secondary site by supporting RAID Manager
communications among different OSs (including the converter for little-endian vs big-endian).
Figure 11 (page 22) represents RAID Manager’s communication among different OSs, and
Table 3 (page 23) shows the supported communication (32-bit, 64-bit, MPE/iX) among different
OSs. Please note the following terms that are used in the example:
• RM-H: Value of HORCMFCTBL environment variable for an HP-UX RAID Manager instance
on Windows
• RM-S: Value of HORCMFCTBL environment variable for a Solaris RAID Manager instance on
Windows
Restriction: RAID Manager for MPE/iX cannot communicate with 64-bit HORCM.
Restriction: RAID Manager’s communications among different operating systems is supported on
HP-UX, Solaris, AIX, Linux, and Windows (this is not supported on Tru64 UNIX/Digital UNIX).
Also, RAID Manager does not require that the HORCMFCTBL environment variable be set—except
for RM-H and RM-S instances (to ensure that the behavior of the operating system platform is
consistent across different operating systems).
Figure 11 RAID Manager communication among different operating systems
22 RAID Manager software environment
- P9000 RAID Manager User Guide 1
- Contents 3
- 4 Contents 4
- Contents 5 5
- 6 Contents 6
- Contents 7 7
- 1 Overview 8
- Provisioning function 9
- Precheck function 10
- User authentication 11
- 12 Overview 12
- In-system replication 13
- Remote replication 13
- Data protection 13
- ◦ A command server 14
- Command device 14
- Command device guarding 15
- # horcctl -DI 16
- AI = 14 TI = 0 CI = 1 16
- Command competition 18
- Command flow 18
- HORCM operational environment 19
- Configuration definition file 23
- LimitTypeDefaultParameter 24
- PRODUCT_ID 26
- HORCM_CMD 27
- \\.\CMD-30095-250-CL1-A 27
- HORCM_INSTP 32
- Business Copy 34
- RAID Manager software files 38
- RAID Manager log files 42
- RAID Manager trace files 43
- Logging raidcom command 46
- /var/log/raidcom.err 47
- User-created files 49
- Controlling User Role 52
- Controlling user resources 53
- Resource lock function 58
- Command execution modes 59
- Context check 60
- Details of check contents 61
- Configuration check 65
- LDEV group function 66
- LDEV group function 67 67
- Device group function 69
- Device group creation 71
- LDEV addition to device group 71
- Device group deletion 73
- Copy group function 74
- When creating a copy group 75
- When deleting a copy group 75
- Copy group creation 76
- LDEV addition to a copy group 76
- LDEV deletion from copy group 77
- Copy group deletion 78
- LDEV group function 79 79
- LDEV group function 81 81
- Using dummy LU 82
- Displayed pair statuses 83
- Multi-platform volumes 84
- 4 Starting up RAID Manager 87
- One instance 88
- Two instances 88
- ◦ for starting [HORCM0]: 91
- About provisioning operations 92
- Asynchronous commands 93
- LDEV nickname function 94
- Operation method 101
- Resource group operations 103
- Internal volume operations 104
- Script examples 106
- Operational flow 114
- External volume operations 120
- Script Examples 121
- Cache Partition operations 123
- Displaying CLPR information 124
- Features of paired volumes 125
- Synchronous 126
- Business Copy operations 127
- Business Copy cascading pairs 128
- Business Copy operations 129 129
- Journal operations 133
- # pairsplit -g oradb 137
- # pairdisplay -g oradb -fc 137
- Access Journal volumes 138
- Restrictions 139
- Snapshot operations 144
- Snapshot volumes 145
- Snapshot pair status 146
- Controlling Auto LUN 147
- Commands to control Auto LUN 149
- Restrictions for Auto LUN 153
- Overview 153
- (3) Propagating Error suspend 154
- Command specifications 155
- Notice on system operation 158
- Configuration examples 159
- (1) Cnt Ac-J 2x2 160
- Remote volume discovery 161
- Discovering a remote volume 162
- Data protection operations 164
- Data Protection facility 167
- # pairdisplay -g oradb 169
- Data Protection facility 169 169
- New options for security 170
- Permitting protected volumes 171
- Environment variables 173
- Volume discovery function 175
- GPT disk for Windows 181
- Host group control 183
- SLPR configuration examples 186
- Dual Hosts 187
- 9 Troubleshooting 190
- System log messages 193
- Command error messages 194
- Specific error codes 202
- SSB codes 203
- (continued) 226
- Contacting HP 266
- Related information 266
- Typographic conventions 267
- Glossary 269
- 270 Glossary 270
- 272 Index 272
- 274 Index 274
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