Pause or Stop a Run
The MiSeq is designed to complete a run from beginning to end without user intervention. However, it is possible to pause a run or stop a run from the Sequencing screen.

You can temporarily pause a run before it has completed. This action is useful when addressing potential issues, such as a full waste bottle. Paused runs can be resumed.
When you select Pause, the current command is completed before pausing the run and placing the flow cell in a safe state.
To pause a run from the Sequencing screen, select Pause. The button changes to Resume. When you are ready to resume the run, select Resume.

You can stop a run during sequencing before the run before its completion by using the Stop button located on the sequencing screen. You might stop a run if the run was set up incorrectly, if the data quality is bad, or hardware malfunctions.
When a run is stopped, the current command is not completed, and the flow cell stage moves to the forward position. Real-Time Analysis software continues analysis for the most recently completed cycle.
Stopping a run is final. A stopped run cannot be resumed. The only option is to proceed to an instrument wash.