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Administration space is space which is reserved for storing blocks which keep track of
where files are located and what files are in what directories. Only the Bitmap, the
Root blocks and the information stored in the files themselves are not stored in
administration spaces.
Administration space is allocated dynamically in chunks of 32 blocks at a time.
If all administration spaces are fully occupied then the filesystem will look for a new
area on the disk and reserve it for storing administration blocks. This means that
administration spaces are marked in use in the normal Bitmap.
Administration spaces are managed seperately and each of the spaces has their own little
bitmap.
The location of the admininstration spaces and their bitmaps are stored in AdminSpaceContainers. Several spaces can be stored in a
single AdminSpaceContainer. AdminSpaceContainers are in a double linked list.
When looking for room to store an administration block this list is scanned to look for a
free block in one of the administration spaces. If such a block is found, then it is
marked in use in the little bitmap belonging to the administration space.
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