dowgrade from 9.15.1P6 to 9.13.1P13

[wolfkiler]

Good day community, unfortunately we had the decision to install firmware version 9.15.1P6 instead of 9.13.1P13 on a new storage we have, basically the goal right now is to find a way to downgrade the firmware version to 9.13.1P13, this storage only has the basic configuration right now, which means there is no data on this storage now. My question, is there any way to downgrade the firmware version from 9.15.1P6 to 9.13.1P13?

[TMACMD]

Why downgrade? There is nothing technically wrong with 9.15.

The official downgrade is documented. May need to pull a KB or find the upgrade/revert guid.

Basically, you have to step backwards through each major version

9.15 -> 9.14 - 9.13.

You may be better off just doing a CLEAN HALT of your nodes and find one of the many places I have indicated how to init a system. 

I would just keep the 9.15

[SpindleNinja]

What's the model number of the system in question?  

[wolfkiler]

is a FAS2820, basicaly we need do this downgrade becouse  we need to migrate the old Storage to this new storage using SVMdr and the firmware version of the new storage is not compatible  with the version of the old Storage  to use SVMdr

[TMACMD]

What’s the source?

svmdr will work with two major version separation

 I’ve personally done 9.8 -> 9.10

 if your source will run 9.13 you will be fine

[wolfkiler]

hi TmacMD, hope you are doing well...

 the firmware version of the old storage is 9.11.1P14

following the   below picture we should go to the version  9.13.1

 please correct my if i wrong and thanks in advance!!!

[TMACMD]

What  is the source platform? Like what is the model or hardware? Can it be updated to 9.13 which would be easier. 

[chenguanghui]

hello:

    Downgrading can only be done step by step. If you are running version 9.15.1, you cannot directly revert to 9.13.1. You must first revert to 9.14.1, and then separately execute the downgrade from 9.14.1 to 9.13.1.

https://docs.netapp.com/zh-cn/ontap/revert/concept_revert_paths.html 

i hope to help you.

Best regards.

[wareer · Accepted solution]

You can directly revert your ONTAP software to only one release earlier than your current ONTAP version：ONTAP 9.15.1>ONTAP9.14.1>ONTAP9.13.1     

Before you revert an ONTAP cluster, you should confirm hardware support and review resources to understand issues you might encounter or need to resolve.

1. Review the ONTAP 9 Release Notes for the target release.

   The “Important cautions” section describes potential issues that you should be aware of before downgrading or reverting.

2. Confirm that your hardware platform is supported in the target release.

   NetApp Hardware Universe

3. Confirm that your cluster and management switches are supported in the target release.

   You must verify that the NX-OS (cluster network switches), IOS (management network switches), and reference configuration file (RCF) software versions are compatible with the version of ONTAP to which you are reverting.

   NetApp Downloads: Cisco Ethernet Switch

4. If your cluster is configured for SAN, confirm that the SAN configuration is fully supported.

   All SAN components—​including target ONTAP software version, host OS and patches, required Host Utilities software, and adapter drivers and firmware—​should be supported.

   NetApp Interoperability Matrix Tool

   Here is the relevant downgrade link, you can refer to it：https://docs.netapp.com/us-en/ontap/revert/task_things_to_verify_before_revert.html