So you're talking about stopping data collection during the period that DTs run? I can't help but comments that if you need to do this, data collection generates a very small amount of IOPs compared to DTs.
What problem are you trying to solve here? Stopping data collection during data collection 'regularly' isn't a hypothetical situation we'd plan to see happening.
I would imagine the DTs would calc since there is data there with gaps in it, but with gaps during those outage windows. I would 'never' recommend doing this, as data collection causes such little IOPs compared to DTs and that data your omitting is potentially valuable.