Every Data ONTAP release family has unique reversion requirements that you must understand and resolve before you decide to revert.
For additional information, and to check for reversion issues that might have been discovered later, see the Data ONTAP Release Notes for 7-Mode for your source and target releases. The following list summarizes reversion issues known when this guide was published.
- If you gained access to licensed or entitled features by upgrading to Data ONTAP 8.2 or later and these features required a license prior to Data ONTAP 8.2, you might need to install a license after reverting.
This is the case if a license was not previously installed for the release to which you revert.
- You need to be aware of the licensing implications
if you have a
node
that is shipped with Data ONTAP 8.2 and you want to
revert it to a release in the Data ONTAP 8.1 release
family.
If your system is shipped with Data ONTAP 8.2 or
later and you reinstall it with a release in the Data ONTAP 8.1 release
family, you must install a key for the desired license package in
the format supported by the Data ONTAP 8.1 release family.
- If your current SP firmware version is not supported for the Data ONTAP release to which you are downgrading or reverting, you must install a supported SP firmware version for the earlier Data ONTAP release.
- Support for up to 1,024 ACEs in NFSv4 ACLs is a new feature in Data ONTAP 8.2.
Reverting to a previous release family requires action if you have NFSv4 ACLs in your environment that contain more than 400 ACEs.
- If you configure a Flash Pool (an aggregate that
contains both HDDs and SSDs) as your root aggregate and you want to
downgrade or revert to any release of Data ONTAP earlier than 8.1.1,
including 8.1, you must first move the root aggregate to an HDD or
SSD aggregate.
Otherwise, your system will not boot after the
downgrade or revert.
- After an upgrade, if you have converted the 32-bit volumes or aggregate to the 64-bit format, you cannot revert the source and destination systems to an older version of Data ONTAP until you delete all of the Snapshot copies on both the source and the destination volumes.