Computer Operating Systems

Urban Voice -- Instructor: Lenny Bailes

Day 16 Agenda

    1.    OTX orientation

    2.    Continue review of DOS commands and Chapter 3 concepts.
          (See for a good explanation
          and picture of the file structure on FAT-based hard drives.)

          ATTRIB command can be used to reset archive (backup status), read-only and system attributes of a file.
                           (See DOS Exercise sheet, 17-19)
          SYS         command can be used to make a floppy or hard disk partition bootable under MS-DOS command-line
                          included with Windows 9.x.
          SCANDISK  used to check/repair disk file system (floppy or hard drive) under Windows 9.x
          CHKDSK    used to check/repair disk file system (floppy or hard drive) under MS-DOS 6 and Windows 
          SCANREG   used to check/repair system registry under Windows 9.x
          DEFRAG      used to defragment floppy or hard disk partition under Windows 9.x/2000/XP
          VER               displays OS version|
          EXTRACT    extracts single files or a group of files from a Windows cabinet (CAB) file.

          DEBUG         used to display system-level information in RAM or on disk.

    Already discussed:

    3.   Continue working on DOS Exercise sheet in the A+ Lab
          Exercises 14-16: Where did the missing 256K of conventional memory go after you loaded the device
                                       drivers in the CONFIG.SYS you created? ___________________________
          Exercises 17-19:
          When we use the ATTRIB command to unhide the MSDOS.SYS and IO.SYS files, they can be deleted
          from a bootable disk (either a hard drive or floppy). When we delete the IO.SYS file, a boot drive is no longer
          bootable.   In these exercises, you discover that, and then restore the file to your boot drive.

          Exercise 20:    We change the parameters that load the RAMDRIVE.SYS driver in CONFIG.SYS, with
                                   a corresponding shift in conventional/extended memory resources.


    Work on or complete the DOS Exercise Sheet
    Study for
      Chapter 3 Quiz!
    Review A+ in Depth, Chapter 4,  p. 125-152. Write out answers to questions 1-6 on p. 172-173


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