ONTAP Select VMware ESXi The expected behavior is depending on cluster deployment. Please contact VMware support or check VMware documentation for more information. The procedure might be disruptive f...ONTAP Select VMware ESXi The expected behavior is depending on cluster deployment. Please contact VMware support or check VMware documentation for more information. The procedure might be disruptive for single-node cluster as drivers and firmware updates are in play on a single ESXi host. The procedure can be non-disruptive if using 2-node cluster (HA pair) with nodes running on different hosts. Upgrading first one ESXi host and then the other, should maintain availability of the HA pair.