Table of ContentsView in Frames

Upgrade requirements for SnapMirror

If you are upgrading Data ONTAP on storage systems that are running SnapMirror, the order in which you upgrade the systems that have SnapMirror destination volumes and the systems that have SnapMirror source volumes depends on whether you are replicating volumes or qtrees.

Volume SnapMirror replication

You must upgrade the destination system before you upgrade the source system. In addition, the destination system must be running a Data ONTAP version that is same or later than the version running on the SnapMirror source system. If you upgrade the source volumes first, subsequent volume SnapMirror transfers will fail.

Synchronous and semi-synchronous and bidirectional volume SnapMirror replication

You must ensure that the source and destination systems are running the same Data ONTAP version. You must also ensure that the Data ONTAP upgrade process on both the systems occurs simultaneously. If not, SnapMirror goes into asynchronous mode. When SnapMirror is in asynchronous mode, the source system replicates data to the destination system every minute until a synchronous replication can be reestablished; that is, when the source system is upgraded so that the same Data ONTAP version is running on destination and source systems.

Qtree SnapMirror replication or SnapVault or tape

The requirement to upgrade SnapMirror destination volumes first does not apply to SnapMirror for qtree replication, SnapVault, or data restoration for tape using the restore command. However, when you upgrade systems that use these features, you should upgrade your SnapMirror destination systems, SnapVault secondary systems, and restoration target systems before the corresponding source systems to maintain backward compatibility.

For more information about running SnapMirror on storage systems configured for network-attached storage (NAS), see the Data ONTAP Data Protection Online Backup and Recovery Guide for 7-Mode.