Sector Interleave

Fred Cisin cisin at
Mon Nov 30 15:45:32 CST 2015

>> Oversimplified remedial tutorial:
>> Ideally, the system reads a sector, does what it has to do with the content, and goes back for the next one, and can read every sector of the track in a single revolution.

  From: "Paul Koning" <paulkoning at>
> Your writeup was aimed at floppy disks, but interleave may also appear 
> on hard drives.  I don't remember it in reasonably modern systems, but 
> it shows up on CDC 6000 systems.

On Mon, 30 Nov 2015, Mike Stein wrote:
> ----- Reply ----- Definitely an issue with IBM PC/XTs and clones; I 
> recall testing every new combination of HD and controller for most 
> efficient interleave before I delivered to the client.

1) Are there any examples newer than PC/XT 5160?

Although, obviously, completely hidden from the user, is it still used on 
anything "modern"?
(Should ALL verbs be changed to past tense?)

2)  Is it used on anything besides spinning rust?

3)  Besides all of my examples being floppy, what else should be 
changed/corrected in what I wrote?

More information about the cctech mailing list