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PowerScale OneFS Upgrade Planning and Process Guide

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Adding a node to the cluster while an upgrade is in progress

In some circumstances, you might need to add a node to the cluster while an upgrade is in progress and before the upgrade has been committed.

To add a node during an upgrade, at least one node in the cluster must have been successfully upgraded to the target version of OneFS. When a new node is added to the cluster during an upgrade, the system images the new node with the previously committed version of OneFS. Then as the cluster upgrade continues, the new node is upgraded to the target version of OneFS. If the cluster upgrade is stopped and rolled back, all the nodes in the cluster are returned to the previously committed version of OneFS.

NOTE:Before adding new hardware to the cluster, first confirm that the hardware is compatible with the current version of OneFS that is installed and the target version of OneFS that you are upgrading to. See the OneFS Supportability and Compatibility Guide for more information.

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