Installing SP1 on a Computer Running Clustering Services

When installing SP1 on a computer running clustering services, unexpected failovers to the secondary node in the cluster can occur. To avoid this, complete the following procedure.

To install SP1 on a computer running clustering services

1. Stop the cluster service on the secondary (inactive) node.
2. Install SP1 on the primary (active) node.
3. Restart the cluster service on the secondary node.
4. Install SP1 on the secondary node.

If the SP1 installation is not completed, the new SP1 files can be installed on the shared disk without upgrading the required supporting files in the Windows NT directory.

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