Exam FlashArray Implementation Specialist topic 1 question 52 discussion

When performing a controller upgrade on a FlashArray, such as during an //X to //XL Non-Disruptive Upgrade (NDU) or an //XR2/R3 to //XR4 controller replacement, it is crucial to ensure that both controllers are actively serving I/O and that host connectivity remains balanced. The command used to check I/O health and confirm that controllers are serving I/O is purehost monitor --balance. This command provides insights into the I/O distribution across the controllers for each host, showing metrics like "I/O Count" and "I/O Relative to Max". It helps to ensure that all paths for each host have approximately the same I/O, which is vital for maintaining performance and high availability during the upgrade process.

Run health check on host connectivity FC and ISCSI pureport list --initiator