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Contents
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14.6 DS Storage Manager GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
14.6.1 Define Metro Mirror paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
14.6.2 Create Metro Mirror pairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
14.6.3 Resume suspended pair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
14.7 ANTRQST API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Chapter 15. Metro Mirror performance and scalability . . . . . . . . . . . . . . . . . . . . . . . . 181
15.1 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
15.1.1 Peak bandwidth requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
15.1.2 RMF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
15.1.3 Initial synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
15.2 Scalability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Chapter 16. Metro Mirror examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
16.1 Resynchronization of suspended volume using TSO . . . . . . . . . . . . . . . . . . . . . . . . 186
16.2 Failover and failback using TSO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
16.2.1 Failover process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
16.2.2 Failback process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
16.3 Open systems volumes with TSO commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
16.4 Define Metro Mirror path using ICKDSF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
16.5 DS CLI freezepprc and unfreezepprc commands . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Part 5. Global Copy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Chapter 17. Global Copy overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
17.1 Global Copy overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
17.2 Volume states and change logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
17.3 Global Copy positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Chapter 18. Global Copy options and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 205
18.1 Global Copy basic options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
18.1.1 Establish Global Copy pair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
18.1.2 Suspend Global Copy pair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
18.1.3 Resume Global Copy pair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
18.1.4 Terminate Global Copy pair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
18.1.5 Convert a Global Copy pair to Metro Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
18.2 Catch-up transition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
18.2.1 Go-to-sync using TSO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
18.2.2 Go-to-sync using ICKDSF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
18.2.3 Go-to-sync using the DS Storage Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
18.2.4 Go-to-sync using the DS CLI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
18.2.5 Display out-of-sync tracks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
18.3 Create a consistent point-in-time copy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
18.4 Cascading for ESS migration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
18.5 Hardware requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
18.6 DS6800 I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
18.7 Global Copy connectivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
18.7.1 Fibre Channel links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
18.7.2 Logical paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
18.8 Distance considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
18.9 Other planning considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Chapter 19. Global Copy performance and scalability . . . . . . . . . . . . . . . . . . . . . . . . 219
19.1 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Summary of Contents for System storage DS6000 Series
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