if the following are true:

• byte at ID: c, cell #49 at time t = 1
• byte at ID: c, cell #48 at time t = 1
• disk bytes read at time t < byte at ID: c, cell #46 at time t

then disk byte at index: ((value of cell 47 at time t) + (disk bytes read at time t)) time: (t + 1) = value of cell (30 + (disk bytes read at time t)) at time t