<<<<<< TIME POSE SUBROUTINE >>>>>>>>>

PAUSE

If they want to quit, do so

PAGETURNER

If they want to quit, do so

    <<<<<< 4 BOTTOM LINES CLEANING SUBROUTINE >>>>>>

BOTCLEAN

If they want to quit, do so

ENCORE5

    <<<<<< REVIEW CLEANING SUBROUTINE >>>>>>

CLEAN

If they want to quit, do so

ENCORE

    <<<<<< CLEAN THE INSIDE OF BOUNDED ARE ONLY >>>>>

BOX

             PHYSICAL VS. LOGICAL STORAGE             

GO

  The file system under UNIX may be visualized on 3 different levels:

  1.  The actual physical disk with arbitrary sized partitions.

     Physical Disk

       Arbitrary 

         Sized   

       Partitions

  2.  The physical disk may be divided into several logical disks or 

      file systems which are typically made up of blocks, each of 

      which is 512 bytes:

 Logical Disk

        ------

        File

        System

          1

        ------

        File

        System

          2

        ------

          ::

          ::

  3.  The file system itself is made up of N blocks.  

 File System 

   Files   

    and    

    Free   

       Blocks