SnapCenter requests VMware to start the quiesce process stopping I/O operations for a very small amount of time in order to take an application consistent backup, once the Snapshot is taken, it will t...SnapCenter requests VMware to start the quiesce process stopping I/O operations for a very small amount of time in order to take an application consistent backup, once the Snapshot is taken, it will then request to start the unquiesce process and restart normal operations.