Question about Intel disk formats

From: Fred Cisin <>
Date: Thu Jun 21 20:24:42 2001

On Thu, 21 Jun 2001, Edwin P. Groot wrote:
> If it is CP/M format, the first track should be SD, whether or not the
> disk is formatted DD. That's how it is in the CP/M systems I have. I

Many of the best systemes are that way, but there are literally thousands
of disk formats that aren't.

> figure you should at least be able to read the first track and hopefully
> there would be a signature of what machine it's from. What I would not
> know is what interleave factor to use for the sector ordering; it seems to
> vary from machine to machine. Start with the original IBM SSSD structure.

In addition to the sector sequence, for anything other than SSSD, you also
have to contend with different sector sizes, and as a result, different
numbers of sectors per track.

Fred Cisin            
PO Box 1236                     (510) 558-9366
Berkeley, CA 94701-1236
Received on Thu Jun 21 2001 - 20:24:42 BST

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