You have the option to reboot hosts prior to starting this workflow in order to verify that the host is in a known good state.
This would also be a good time to take a Snapshot copy in order to facilitate a revert if needed later. To verify that the server configuration is persistent and pristine across reboots, complete the following steps:
Shut down all your open applications.
Review the logs for errors.
Verify that the host sees all of its paths.
Reboot the host.