9.6.3 Moving to a new IBM FlashSystem 9100 cluster You might have a highly populated, intensively used IBM FlashSystem 9100 cluster that you  want to upgrade. You might also want to use the opportunity to overhaul your IBM  FlashSystem 9100 and SAN storage environment. Complete the following steps to replace your cluster entirely with a newer, bigger, and more  powerful one: If your servers can tolerate a brief, scheduled outage to switch from one IBM FlashSystem  9100 cluster to another, you can use the IBM FlashSystem 9100 remote copy services (Metro  Mirror or Global Mirror) to create your data replicas, following these steps: If you must migrate a server online, instead, you must use host-based mirroring by completing  these steps: 1. Install your new IBM FlashSystem 9100 cluster. 2. Create a replica of your data in your new cluster. 3. Migrate your servers to the new IBM FlashSystem 9100 cluster when convenient. 1. Select a host that you want to move to the new IBM FlashSystem 9100 cluster and find all  the old volumes you must move. 2. Zone your host to the new IBM FlashSystem 9100 cluster. 3. Create remote copy relationships from the old volumes in the old IBM FlashSystem 9100  cluster to new volumes in the new IBM FlashSystem 9100 cluster. 4. Map the new volumes from the new IBM FlashSystem 9100 cluster to the host. 5. Discover new volumes on the host. 6. Stop all I/O from the host to the old volumes from the old IBM FlashSystem 9100 cluster. 7. Disconnect and remove the old volumes on the host from the old IBM FlashSystem 9100  cluster. 8. Unmap the old volumes from the old IBM FlashSystem 9100 cluster to the host. 9. Make sure remote copy relationships between old and new volumes in the old and new  IBM FlashSystem 9100 cluster are synced. 10.Stop and remove remote copy relationships between old and new volumes so that the  target volumes in the new IBM FlashSystem 9100 cluster receive read/write access. 11.Import data from the new volumes and start your applications on the host. 1. Select a host that you want to move to the new IBM FlashSystem 9100 cluster and find all  the old volumes that you must move. 2. Zone your host to the new IBM FlashSystem 9100 cluster. 3. Create volumes in the new IBM FlashSystem 9100 cluster of the same size as the old  volumes in the old IBM FlashSystem 9100 cluster. 4. Map the new volumes from the new IBM FlashSystem 9100 cluster to the host. 5. Discover new volumes on the host. 6. For each old volume, use host-based mirroring (such as AIX  mirrorvg ) to move your data  to the corresponding new volume. 7. For each old volume, after the mirroring is complete, remove the old volume from the  mirroring group. Chapter 9. Maintenance  347