What is the best practice of NDU for MCC?
Applies to
- ONTAP 9
- Non-Disruptive Upgrade (NDU)
- MetroCluster cluster (MCC)
Answer
During the ONTAP's NDU period, keep at least one pair have the same ONTAP version between the Active site and the DR site.
For example, A1/A2 are nodes from A site and B1/B2 are nodes from B site. If A1-B1/A2-B2 are each DR paired, then an upgrade sequence of either A1 / B1 -> A2 / B2 or A2 /B2->A1 / B1 is recommended.