Explorapedia Nature 1.2: Testing CD-ROM Drive for File Access
  
PSS ID Number: Q151322
Article last modified on 06-05-1996
 
1.2
 
WINDOWS
 

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The information in this article applies to:
 
 - Microsoft Explorapedia series:
      World of Nature for Windows, version 1.2
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SUMMARY
=======
 
Because of physical read limitations of some CD-ROM drives, the
Microsoft World of Nature for Windows, version 1.2 compact disc may deny
access to some files and folders. This article lists those files and
supplies a method to test your CD-ROM drive.
 
MORE INFORMATION
================
 
The CD-ROM drive may have difficulty reading the final three
folders, listed below, from the World of Nature for Windows compact disc:
 
   Folders                            Location on Disk
   -------                            ----------------
 
   Mmcat                                 644-645 MB
   Loginadm                              629-629 MB
   Nature                                197-623 MB
 
To test for specific drive-capacity limitations, try to access the
following files:
 
   Files                              Location on Disk
   -----                              ----------------
 
   Mmcat\Ver.dll                         645 MB
   Loginadm\Loginadm.wri                 629 MB
   Nature\Nature.m14                     623 MB
 
Note that the file Nature.m14 is approximately 409 MB and spans the
compact disc from 214 to 623 MB. It should be tested by copying the file to
the null port at MS-DOS.
 
How to Copy Nature.m14 to the Null Port at MS-DOS
-------------------------------------------------
 
1. Type the following at an MS-DOS command prompt and press ENTER
 
      cd <drive>:
 
   where <drive> is the CD-ROM drive letter.
 
2. Type the following and press ENTER:
 
      cd nature
 
3. Type the following and press ENTER:
 
      copy Nature.m14 nul
 
   This command copies the file on the compact disc to a null device. If
   there is a problem copying the files, error messages appear on the
   screen.
 
Testing Your CD-ROM Drive
-------------------------
 
The World of Nature for Windows compact disc contains 625 MB of data. The
final file on the compact disc is Mmcat\Ver.dll.
 
Do the following to test your CD-ROM drive:
 
1. Attempt to copy the following files to the hard disk drive:
 
      Files                              Location on Disk
      -----                              ----------------
 
      Mmcat\Ver.dll                         645 MB
      Loginadm\Loginadm.wri                 629 MB
      Nature\Nature.m14                     623 MB
 
   For more information about how to perform this task in Windows, see
   your Windows printed documentation or online Help.
 
2. If the following error message appears
 
      CDR101: Not Ready
 
   the CD-ROM player cannot read the disc at the specified location. If
   the file copies, test the file's integrity using the MS-DOS File
   Compare program (Fc.exe) with the /B(binary) switch. For example, to
   compare the ver.dll file on your compact with the ver.dll file on
   your hard disk drive, type the following at the MS-DOS command prompt
   and press ENTER:
 
      fc  /b  d:\mmcat\ver.dll  c:\ver.dll
 
   If you receive errors, the CD-ROM drive is having problems reading
   the compact disc at that location.
 
This process allows you to ensure the integrity of files that have been
copied from your CD-ROM drive to your hard disk drive, compare the files
using the MS-DOS File Compare program (Fc.exe). This test can be used to
determine if the CD-ROM subsystem is functioning properly at the
device driver or hardware level(s).
 
The Fc.exe utility is a useful method for testing problems related to
general protection (GP) faults or other critical errors (such as read
errors or out of memory messages) that can occur with Windows CD-ROM
applications.
 
KBCategory: kbsetup kbenv kbmm kbhw kbtshoot kbprb
KBSubcategory:
 
Additional reference words: 1.00 multi media multimedia multi-media
mmtitles kbmm CD C.D. ROM disc compact disk read only memory errors
missing unavailable read-error win95
 
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Copyright Microsoft Corporation 1996.