The correct answer isB. Run Nutanix Cluster Check (NCC).

Before performingany upgrade procedure(AOS, Foundation, LCM, etc.), it is strongly recommended torun the Nutanix Cluster Check (NCC). This tool performs acomprehensive health assessmentof the cluster and validates its readiness for the upgrade, including:

Disk integrity

Network configuration

CVM health

Cluster services status

Prism UI Navigation Path:

Health > Run NCC Check (via Actions menu)

Command Line Alternative:

bash

CopyEdit

ncc health_checks run_all

Clarifications:

A (Put hosts into maintenance mode): Not required before upgrades; LCM handles host management automatically.

C (Put CVMs into maintenance mode): Not correct. CVMs must be operational during upgrades.

D (Clear all alerts): Irrelevant unless the alerts indicate upgrade-blocking issues, which NCC identifies.

Official Reference:

Nutanix Upgrade Guide – Pre-upgrade Checklist Section

Excerpt: “It is strongly recommended to run NCC prior to starting the upgrade process to detect any cluster issues.”

Answer: B