xFiles disc structure

Low Level View

An xFiles disc is a collection of variable length chunks. Each chunk can
contain a file or a directory or the chunk table. There's only one chunk
table and it's found in chunk number 0. All other disc objects are held in
chunks numbered 1+.

At the start of the disc image appears a header which gives the location of
the chunk directory and certain other morsels of interesting information
about the disc.

So that's it. A header at the start which points to chunk zero. A disc which
contains a number of chunks which can contain files, directories or the
chunk table.
