Games definitely had custom "put this data on this sector" software, for authoring their gold masters. Generally, data that was needed fast was on the outer tra

Games definitely had custom "put this data on this sector" software, for authoring their gold masters. Generally, data that was needed fast was on the outer tracks, since they spin faster and can have lower seek times. Something less time-critical like background music would be on a slower part of the disk, streamed incrementally. If I'm remembering right — has been some years.