To migrate to a new version of the SQL Server instance using AGs, the only supported method is a distributed AG, which is in SQL Server 2016 Enterprise Edition or later.
In practice, the exact process depends on factors such as the deployment topology of your AGs and the commit mode of each replica.
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After creating the folder, the installation was successful.
Reference: Pinal Dave (https://blog.sqlauthority.com)Pinal Dave is a SQL Server Performance Tuning Expert and an independent consultant.
A higher version of a SQL Server instance cannot be added as a new replica to an existing AG.
For example, a SQL Server 2017 replica cannot be added to an existing SQL Server 2016 AG.
For other files such as System DB’s, User DB’s and Backup’s she had already created folder.
But in the simplest scenario, a rolling upgrade is a multi-stage process that in its simplest form involves the following steps: If you have deployed an AG only for disaster recovery, you may need to fail over the AG to an asynchronous-commit secondary replica.
Such configuration is illustrated by the following figure: In this situation, you must fail over the AG to the asynchronous-commit secondary replica during the rolling upgrade.
When upgrading a SQL Server instance that hosts an Always On Availability Group (AG) to a new SQL Server 2017 version, to a new SQL Server service pack or cumulative update, or when installing to a new Windows service pack or cumulative update, you can reduce downtime for the primary replica to only a single manual failover by performing a rolling upgrade (or two manual failovers if failing back to the original primary).
During the upgrade process, a secondary replica will not be available for failover or for read-only operations, and after the upgrade, it may take some time for the secondary replica to catch up with the primary replica node depending upon the volume of activity on the primary replica node (so expect high network traffic).
Click ‘Retry’ to retry the failed action, or click ‘Cancel’ to cancel this action and continue setup. I looked into the configuration file Configuration and found that she was using the H drive for Temp DB.