Write up a state diagram for choosing A#1, A#2, or 'regular'
Write up a state diagram that shows how the BES will choose between serving a granule from a spinning disk file, or use A#1 or use A#2.
Do we always require a separate process to build/populate the DMR++ for A#2? YES
We always prefer a file on spinning disk over using S3
Updated the diagram; includes info from Nathan.