Hi all, I've read that it is recommended to move LS mirror source volumes to an aggregate on a node to be upgraded last. Would it be sufficient instead to quiesce LS mirrors, NDU and then resume relationships afterwards? Are there dangers involved in doing it this way?
I am not worried about any temporary performance degridation by quiescing the mirrors, although existing connections must not be inturrupted as they are NFSv3 datastores for ESXi. In fact the only reason I have LS mirrors at all on >2 node clusters is to ahear to best practices.
I'll be NDU'ing a 4-node cluster from OnTap 8.2.2 -> 8.3.2P9 -> 9.1P1.
Peter's response was specifically about creating Load-Sharing Mirrors for data volumes. Unless and until you see an announcement about deprecating the use of LSMs altogether, it is still a best practice to create LSMs for SVM root volumes on every node in the cluster. They still need to be deleted and recreated for major version upgrades of ONTAP. Follow the instructions in the ONTAP 9 SVM Root Volume Protection Express Guide to create and maintain the LSMs.