Verifying the mirroring configuration

All storage systems, volumes, and VMware ESX hosts at both sites must be properly connected to their remote counterparts and configured for site mirroring.

Before you install the IBM® Storwize® Family SRA, verify that the following prerequisites are completed:
  • Your local Storwize Family at the protected (primary) site has mirroring connectivity with the target Storwize Family at the recovery (secondary) site. For IBM SVC Stretched Cluster, stretched volumes are created, and both copies of a stretched volume are online. For IBM Hyperswap, hyperswap volumes are created, and both the master volume and aux volume of a hyperswap volume are online.
  • The name of each Storwize Family is unique at both the protected and the recovery sites.
  • The target name of any target Storwize Family (remote copy system) is identical to the predefined System Name of that same remote Storwize Family.
  • The storage pools that contain the replicated volumes at both the protected and recovery sites are sufficient for creating the snapshots of all replicated volumes concurrently.
  • For non pre-configured environments, an extra space for Test Failover and Failover is necessary. Ensure that enough space is available in the pool for it.
  • Remote copying is defined for all Storwize Family-based volumes that you intend to protect as part of your Disaster Recovery Plan (DRP). For IBM SVC Stretched Cluster, stretched volumes are created, and both copies of a stretched volume are online. For IBM Hyperswap, hyperswap volumes are created, and both the master volume and aux volume of a hyperswap volume are online.
  • Protected volumes are mapped to the protected VMware ESX hosts. For Stretched Cluster, the stretched volumes are mapped to both the protected and recovery VMware ESX hosts. For IBM Hyperswap, the master volume and aux volume of a hyperswap are mapped to both the protected and recovery VMware ESX hosts.
  • For non-preconfigured environments, the recovery Storwize Family-based volumes remain unmapped.
  • The recovery VMware ESX/ESXi hosts are defined as Storwize Family hosts at the recovery site. For IBM Stretched Cluster and IBM HyperSwap, the recovery VMware ESX/ESXi hosts are defined as storage hosts in SVC.
  • Recovery VMware ESX/ESXi host ports are FC-zoned with the storage system at the recovery site, and are visible by that storage system.