Downgrading Oracle Grid Infrastructure to 18c when Upgrade Fails

11.11.1.2 Downgrading Oracle Grid Infrastructure to 18c when Upgrade Fails

If upgrade of Oracle Grid Infrastructure fails before CVU post upgrade checks succeed, then you can run setup.exe and downgrade Oracle Grid Infrastructure to the earlier release.

Run this procedure to downgrade Oracle Clusterware only when the upgrade fails before CVU post upgrade checks succeed:

From the later release Grid home, run setup.exe in silent mode, to downgrade Oracle Clusterware:
```
C:\> C:\app\19.0.0\grid\setup.exe -silent –downgrade
```
On UNIX systems, run gridSetup.sh instead of setup.exe.

Note:

You can downgrade the cluster nodes in any sequence.
Ensure that the user who performs the downgrade procedure is the same user who performed the upgrade procedure, and belongs to the same user groups, ORA_ASMDBA and ORA_ASMADMIN.

Downgrading Oracle Standalone Cluster to 12c Release 2 (12.2)

Downgrading to Oracle Grid Infrastructure 12c Release 1 (12.1.0.2)

Parent topic: Downgrading Oracle Clusterware to 18c