QuestionQ25

Disaster Recovery

A customer wants an existing iSCSI datastore running on the NetApp ONTAP AFF cluster Cluster01 to keep operating even during a complete site failure. Another ONTAP AFF cluster, Cluster02, already exists in a different data center at the company site. You have successfully implemented a SnapMirror active sync relationship between the clusters. The LUN is replicated and the relationship is healthy.

Which two steps must you perform next?

Choose two
  • A Map the LUNs on the secondary site.
  • B Rescan the disk on the application host.
  • C Change the service policy on the SAN LIFs.
  • D Map the LUNs on the primary site.
Explanation

SnapMirror active sync maintains an identical, simultaneously-writable LUN image on both the source and destination cluster so that if the primary site fails, the host can keep issuing I/O to the surviving cluster with no manual cutover. For the host to actually be able to use that secondary-site copy, the LUN must be mapped to the host's igroup on the destination cluster, and the host must rescan its disks so its multipathing stack discovers and can use the newly available paths to the secondary cluster.

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