On Thu, 14 Sep 2017, Warner Losh via cctalk wrote:
And then there's Venix disks, which have both an interlace, as well as a
skew from track to track (as well as doing one side in ascending track
order followed by the other side in descending track order), but I
digress...
The software that you use must deal with interlace and skew.
(typically with a list/table of sector sequences, and variables such as
index gap and inter-sector gaps)
Thank you for the details.
There are an amazing variety of possibilities.
A physical skew and/or interlace/arrangement of sectors will sometimes
work in the wrong order, but with a performance penalty (or, in some cases,
improvement).
I have run into quite a few badly maintained drives. The innermost
(higher numbered) tracks are the most sensitive to problems.
