Old UNIX file system formats

[norman at nose.cita.utoronto.ca]

I've assembled some notes from old manuals and other sources
on the formats used for on-disk file systems through the
Seventh Edition:

http://www.cita.utoronto.ca/~norman/old-unix/old-fs.html

Additional notes, comments on style, and whatnot are welcome.
(It may be sensible to send anything in the last two categories
directly to me, rather than to the whole list.)