FAS and V-Series Storage Systems Discussions

Cluster Mixed Version with FAS2720 and FAS3220

biks

We are planning to add a new HA-Pair FAS2720 in cluster with FAS3220 9.1Px. Our plan is to join this HA-Pair in mixed version for a tech refresh. Looking at the docs...It's doable, but not advised. https://docs.netapp.com/ontap-9/index.jsp?topic=%2Fcom.netapp.doc.dot-cm-ug-rdg%2FGUID-AC0EB781-583F-4C90-A4C4-BC7B14CEFD39.html

Mixed version requirements

Beginning with ONTAP 9.3, by default, you cannot join new nodes to the cluster that are running a version of ONTAP that is different from the version running on the existing nodes. If you plan to add new nodes to your cluster that are running a version of ONTAP that is later than the nodes in your existing cluster, you should upgrade the nodes in your cluster to the later version first, then add the new nodes.

Mixed version clusters are not recommended, but in certain cases you might need to temporarily enter a mixed version state. For example, you need to enter a mixed version state if you are upgrading to a later version of ONTAP that is not supported on certain nodes in your existing cluster. In this case, you should upgrade the nodes that do support the later version of ONTAP, then unjoin the nodes that do not support the version of ONTAP you are upgrading to using the advance privilege cluster unjoin -skip-lastlow-version-node check command.

You might also need to enter a mixed version state for a technical refresh or an interrupted upgrade. In such cases you can override the ONTAP 9.3 default behavior and join nodes of a different version using the following advance privilege commands: cluster join -allow-mixed-version-join cluster add-node -allow-mixed-version-join When you have to enter a mixed version state, you should complete the upgrade as quickly as possible. An HA pair must not run an ONTAP version from a release that is different from other HA pairs in the cluster for more than seven days. For correct cluster operation, the period the cluster is in a mixed version state should be as short as possible.

When the cluster is in a mixed version state, you should not enter any commands that alter the cluster operation or configuration except as necessary to satisfy the upgrade requirements.

 

My question is if it's possible to join the new FAS2720 into the existing cluster temporarily during the vol move. Someone has already did this kind of mixed version ?

 

Thank you in advance for your reply.

Michael

1 ACCEPTED SOLUTION

andris

Unfortunately, the mixed-version cluster support cannot be used in your situation.

9.1 - 9.2 - 9.3 can be mixed from the FAS3220 perspective on 9.1.

9.3 - 9.4 (minimum for FAS2720) - 9.5 can be mixed from the FAS2720's perspective. But the issue is that min. ONTAP for FAS27xx is ONTAP 9.4.

 

Consider approaches that allow you to snapmirror or copy the data you need migrated to the FAS2720 as a new cluster.

More options are documented here: http://docs.netapp.com/platstor/topic/com.netapp.doc.hw-upgrade-controller/home.html

View solution in original post

1 REPLY 1

andris

Unfortunately, the mixed-version cluster support cannot be used in your situation.

9.1 - 9.2 - 9.3 can be mixed from the FAS3220 perspective on 9.1.

9.3 - 9.4 (minimum for FAS2720) - 9.5 can be mixed from the FAS2720's perspective. But the issue is that min. ONTAP for FAS27xx is ONTAP 9.4.

 

Consider approaches that allow you to snapmirror or copy the data you need migrated to the FAS2720 as a new cluster.

More options are documented here: http://docs.netapp.com/platstor/topic/com.netapp.doc.hw-upgrade-controller/home.html

View solution in original post

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