File Manager and Shell Report Total Size of CD-ROMs as 128 MB (120898)
The information in this article applies to:
- Microsoft MS-DOS operating system 3.1
- Microsoft MS-DOS operating system 3.2
- Microsoft MS-DOS operating system 3.21
- Microsoft MS-DOS operating system 3.3
- Microsoft MS-DOS operating system 3.3a
- Microsoft MS-DOS operating system 4.0
- Microsoft MS-DOS operating system 4.01
- Microsoft MS-DOS operating system 5.0
- Microsoft MS-DOS operating system 5.0a
- Microsoft MS-DOS operating system 6.0
- Microsoft MS-DOS operating system 6.2
- Microsoft MS-DOS operating system 6.21
- Microsoft MS-DOS operating system 6.22
This article was previously published under Q120898 SUMMARY
File Manager and the MS-DOS Shell may report 128 megabytes (MB) as the
total size of a CD-ROM and zero (0) MB as the amount of free space. This
occurs because the Microsoft CD-ROM Extensions (MSCDEX) reports 128 MB as
the capacity of a CD regardless of the real capacity or true remaining free
space on the CD.
MORE INFORMATION
MSCDEX reports 128 MB for the MS-DOS DISK INFO function call. This MS-DOS
API is used by File Manager and Shell. Although it is not difficult to find
the capacity of a CD-ROM, MSCDEX does not use this information. MSCDEX
reports a total of 65,535 clusters of 2 kilobytes each and 0 free clusters.
| Modification Type: | Major | Last Reviewed: | 5/6/2003 |
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| Keywords: | KB120898 |
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