IRC excerpt:
[12-20 15:20] <steadfasterX> i have a partition: end=378879 start=377856
[12-20 15:21] <steadfasterX> so the calcluation would be 378879-377856
[12-20 15:21] <steadfasterX> which is 1023
[12-20 15:21] <steadfasterX> which can never be correct
[12-20 15:22] <steadfasterX> this is bc in the calculation it will need to include the start (or end) sector itself
[12-20 15:23] <steadfasterX> when i dump without that +1 i miss exact 512 bytes so 1 sector