System-level health checks are provided to help ensure that no pathologies interfere with the software update. If a problem is encountered, it is noted in the Alert Log and the update process is aborted. System software updates do not proceed until all problems have been corrected.
You can manually run the same health checks in advance of any planned update. This allows you to check the state of the system prior to scheduling an update maintenance window so you can correct any problems that could interfere with the update process. Any problem report that is issued by a manual health check is identical to that issued by the health checks integrated in the update process. As with the integrated health checks, you are presented with a link to the Alert Log, as described in Alert Log Entries, when problems are found. If no problems are found, the System Ready state transitions to Yes to indicate that the system is ready for software updates.