You can use System Manager to update a cluster nondisruptively to a specific Data ONTAP version. In a nondisruptive update, you have to select a Data ONTAP image, validate that your cluster is ready for the update, and then perform the update.
Obtaining ONTAP software images
You must copy a software image from the NetApp Support Site to an HTTP server or FTP server on your network so that nodes can access the image.
Updating the cluster nondisruptively
You can use System Manager to update a cluster or individual nodes in HA pairs that are running Data ONTAP 8.3.1 to a specific version of ONTAP software without disrupting access to client data.