Microsoft KB Archive/120898

= File Manager and Shell Report Total Size of CD-ROMs as 128 MB =

Article ID: 120898

Article Last Modified on 5/6/2003

-

APPLIES TO


 * Microsoft MS-DOS 3.1
 * Microsoft MS-DOS 3.2 Standard Edition
 * Microsoft MS-DOS 3.21 Standard Edition
 * Microsoft MS-DOS 3.3 Standard Edition
 * Microsoft MS-DOS 3.3a
 * Microsoft MS-DOS 4.0 Standard Edition
 * Microsoft MS-DOS 4.01 Standard Edition
 * Microsoft MS-DOS 5.0 Standard Edition
 * Microsoft MS-DOS 5.0a
 * Microsoft MS-DOS 6.0 Standard Edition
 * Microsoft MS-DOS 6.2 Standard Edition
 * Microsoft MS-DOS 6.21 Standard Edition
 * Microsoft MS-DOS 6.22 Standard Edition

-



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.

Additional query words: 4.00 5.00 6.00 6.20

Keywords: KB120898

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.