Microsoft KB Archive/151322

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

= 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.dll 645 MB Loginadm.wri 629 MB 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
  Type the following at an MS-DOS command prompt and press ENTER cd : where is the CD-ROM drive letter.   Type the following and press ENTER: cd nature   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.dll.

Do the following to test your CD-ROM drive:

  Attempt to copy the following files to the hard disk drive: Files Location on Disk —– —————- Mmcat.dll 645 MB Loginadm.wri 629 MB Nature.m14 623 MB For more information about how to perform this task in Windows, see your Windows printed documentation or online Help.   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:.dll c:.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.