Data Organization: I. Organizing Tracks per Sector
The Physical Placement of Sectors
The most practical logical organization of sectors on a track is that sectors are adjacent, fixed-sized segments of a track that happens to hold a file.
Physically, however, this organization is not optimal: after reading the data, it takes the disk controller some time to process the received information before it is ready to accept more. If the sectors were physically adjacent, we would use the start of the next sector while processing the info just read in.