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Q100013: Defrag Reports Unmovable Block Without Any Hidden/System Files

Article: Q100013
Product(s): Microsoft Disk Operating System
Version(s): MS-DOS:6.0,6.2,6.21,6.22
Operating System(s): 
Keyword(s): 
Last Modified: 03-DEC-1999

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The information in this article applies to:

- Microsoft MS-DOS operating system versions 6.0, 6.2, 6.21, 6.22 
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SUMMARY
=======

If Microsoft Defragmenter (Defrag) displays unmovable blocks (denoted by an "X")
and you don't have any hidden system files on your disk, you probably have one
of the following:

- Lost allocation units. To correct this problem, run CHKDSK /F before you run
  Defrag. Or, if you have MS-DOS 6.20 or higher, run Scandisk before you run
  Defrag.

- Executable files (.EXE or .COM files) that do not have the MS-DOS signatures
  for .EXE or .COM files ("MZ" or "SC"). Old executable files, shareware files,
  and some executable files used in copy- protection schemes do not have the MZ
  or SC signatures.

NOTE: Defrag looks for *DOS.* and *IO.* to find all the system files on your
disk. Defrag does not move system files and represents them in the user
interface with an "X."

Additional query words: 6.22 6.00 6.20 hard disk drive

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Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS621 kbMSDOS622 kbMSDOS620 kbMSDOS600
Version           : MS-DOS:6.0,6.2,6.21,6.22

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