I sense a lack of clarity here....I don't know who's asking what but here goes: The interleave for the FILE is 10 on a stock '41. The DIRECTORY interleave on track 18 is 3. As far as altered interleave goes: the drive is expecting the next block of your file on the 10th sector from now. The last sector read counts as 1. next is 2, etc...the drive is ready to read when sector 10 arrives. If the interleave is 11, that is not much slower at 300 RPM. BUT!!.. if your interleave is say 9 or so....that secto
r is HISTORY when the drive is ready and it must wait an entire revolution. Think about it like a rotating pie...Theoretically, if your track was 10 sectors and the interleave was 1, wouldn't that be identical to and interleave of 11? Now if the time taken to process the last sector is shortened by fastload routines, if you place the sector sooner, it will get read sooner. That's the whole idea of interleave: timing.
