[ale] What format is the "make zdisk" Linux boot disk ?

[dsrekjw at prism.gatech.edu (Joe Whitaker)]

When using the command: "make zdisk"
The disk boots just fine.
What format is it? 


How can I mount it?
I tried to mount it as msdos, ext2, 
and some others, but no luck.


How can I copy it to make a backup?


So far the only thing I can do to make a 
second copy was another "make zdisk".
Sure takes a long time though.

-joew
joew at stonehenge.ohr.gatech.edu