When to revert and when to call technical support

You can downgrade or revert without assistance when downgrading or reverting new or test clusters, but you should call technical support if you encounter problems during or after upgrade, or if you want to downgrade or revert a production cluster.

You can revert or downgrade to an allowed ONTAP release without assistance from technical support only in the following scenarios:

If the upgrade fails, do not attempt to revert ONTAP in a production environment without assistance. If you encounter any of the following circumstances, contact technical support immediately:

If you created volumes in ONTAP 9.5 or later and you need to revert to an earlier version, contact technical support to confirm if any of the volumes use adaptive compression. Volumes using adaptive compression must be uncompressed before reverting.