David Mullen ASC
Moderator
On Mutants, which followed this work flow, we had 12 D mags which covered about 3 days shooting with a single camera and we had major problems at one point because of missed flights.
Yes, in my case, I figured two-days worth would be enough because we were shooting in Los Angeles, but ultimately we ended up shooting a 60:1 ratio for that movie and the whole data recording idea at the time (2003) would have been unrealistic.