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2.44
Requirements and Restrictions
Remote Copy User’s Guide InForm OS Version 2.3.1
2.14.2 1-to-N Restrictions
In addition to those requirements and restrictions described in Requirements and Restrictions
on page 2.41, the following also apply 1-to-N Remote Copy configurations:
■ In a 1-to-N configuration, one primary storage server participates in a maximum of two
pairs, one for each backup storage server (Figure 2-20). One of these pairs might also be
bidirectional.
Figure 2-20.
1-to-N Maximum Supported Configuration
■ 1-to-N Remote Copy can be used in either Remote Copy over IP (RCIP) and Remote Copy
over Fibre Channel (RCFC) configurations.
■ For RCFC configurations, any storage server acting as a primary must have at least four
controller nodes. For RCIP configurations, the primary and backup servers must have a
minimum of two controller nodes each.
■ Primary systems with only two controller nodes must be InServ S, T, or F-Class Storage
Servers.
■ InServ E-Class Storage Servers can only serve as backup servers.
Primary Server
Backup Servers (Maximum of 2)
Direction of data
replication under
normal operating
conditions
- 3PAR Remote Copy 1
- User’s Guide 1
- 3 Remote Copy Setup 5
- 4 Using Remote Copy 6
- AQuick Setup Guide 7
- B Remote Copy Commands 7
- D Comparing MTU Speeds 9
- RH Revision History 9
- Table of Contents 10
- Introduction 11
- 1.1 Audience 12
- 1.2 Related Documentation 12
- 1.3 Organization 13
- 1.4 Typographical Conventions 14
- 1.5 Advisories 15
- Advisories 16
- Remote Copy Overview 17
- 2.1 Overview 19
- 2.2.2 Remote Copy Concepts 20
- 2.4 Remote Copy Pairs 22
- 2.5 Remote Copy Configuration 23
- Remote Copy Configuration 24
- 2.5.3 N-to-1 Configurations 25
- 2.5.4 1-to-N Configurations 27
- 2.6 Remote Copy Targets 31
- Direction of data 32
- 2.7 Remote Copy Links 33
- 2.8 Remote Copy Connections 34
- 2.8.1 IP Networks 35
- 2.9 Remote Copy Operation 36
- 2.9.1 Volume Group Modes 38
- 2.9.1.1 Synchronous Mode 39
- 2.9.1.1.1 Latency 40
- 2.9.2 Synchronization Types 41
- Remote Copy Operation 42
- 2.9.7 Role Reversal 46
- 2.11.1 In Synchronous Mode 47
- Use of Virtual Copy Snapshots 48
- 2.13 Error Handling 51
- 2.13.2 Double Link Failure 52
- Error Handling 53
- 2.13.5 Write Errors 54
- 2.13.6 Read Errors 55
- TCP/IP Network 57
- Requirements and Restrictions 58
- N-to-1 Restrictions 59
- 2.14.2 1-to-N Restrictions 60
- Remote Copy Setup 63
- 3.1 Available Setup Methods 64
- 3.2 Preparing for Setup 64
- 3.4.2.1 Setting the Gateway 71
- <N:S:P>) 72
- 3.5 Setting Up Remote Copy 78
- 3.5.1.4 Start Copying 85
- Node 0 WWN: 20210002AC0000C3 92
- Node 1 WWN: 21210002AC0000C3 92
- <group_name> 100
- Using Remote Copy 107
- 4.1 Management 108
- 4.5 Manual Resynchronization 111
- Modifying Virtual Volumes 115
- 4.9 Limiting Throughput 116
- 4.10 Stopping Remote Copy 117
- 4.11 Remote Copy Commands 117
- Remote Copy Commands 118
- Remote Copy volume group 120
- Task Command 120
- Performance and Scripting 121
- Considerations 121
- 5.1.2 Initial Synchronization 122
- 5.1.3 Distance 122
- 5.1.4 MTU Size 122
- 5.1.5 Autonegotiation 123
- 5.1.6 Remote Copy Mode 123
- 5.1.6.2 Synchronous Mode 124
- 5.3 Scripting Notes 125
- Scripting Notes 126
- Quick Setup Guide 127
- Table A-1. RCIP Setup 128
- A.3 Setting Up Remote Copy 129
- Table A-3. Remote Copy Setup 130
- Setting Up Remote Copy 131
- InForm OS CLI 135
- Administrator’s 135
- RESTRICTIONS 142
- EXAMPLES 142
- Group1 142
- specifier 173
- ■ Port. The port ID 208
- Group1 should be 218
- Example Setup and 219
- Disaster Recovery 219
- Chapter 3, Remote Copy Setup 220
- Remote Copy Setup Examples 221
- On InServ1: 224
- # showrcopy 224
- On InServ2: 225
- On InServ2 229
- InServ2 (Primary) 233
- InServ3 (Primary) 233
- InServ1 (Secondary) 233
- Direction of data replication 233
- InServ2 (Backup) 245
- InServ3 (Backup) 245
- InServ1 (Primary) 245
- ■ On InServA: 258
- ■ On InServB: 259
- ■ On InServC: 260
- InServB 267
- In the example above: 267
- ◆ On InServA: 269
- ◆ On InServB: 270
- ◆ On InServC: 271
- command on InServB and 281
- Primary-Rev) 284
- InServC 287
- -discard option bypasses 299
- To begin data migration: 317
- startrcopygroup -t 321
- Primary-Rev 326
- Primary, rather 329
- Comparing MTU Speeds 331
- Revision History 343
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