Home > Storage > PowerScale (Isilon) > Product Documentation > Cloud > PowerScale: CloudPools and ECS > Nondisruptive upgrade support
When a cluster that has been using CloudPools 1.0 is upgraded to OneFS 8.2.0 or higher, a new CHANGEOVER process is initiated automatically after the upgrade commit. The process ensures a smooth transition from CloudPools 1.0 to CloudPools 2.0. CloudPools 2.0 is ready to use once the upgrade state is committed. For more information about upgrade states, see the PowerScale: Non-Disruptive Upgrade Best Practices white paper.