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Q90994: File Manager Displays Actual Total Disk Space

Article: Q90994
Product(s): Microsoft Windows 3.x Retail Product
Version(s): WINDOWS:3.1,3.11; winnt:3.1
Operating System(s): 
Keyword(s): 
Last Modified: 08-AUG-2001

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The information in this article applies to:

- Microsoft Windows for Workgroups versions 3.1, 3.11 
- Microsoft Windows NT Server version 3.1 
- Microsoft Windows NT Workstation version 3.1 
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SUMMARY
=======

When you use Windows for Workgroups or Windows NT File Manager, the total disk
size displayed in the status bar may differ from the specified formatted size of
the disk.

For example:

- 1.44 megabyte (MB) disks display as having 1.38 MB total space.

- 1.2 MB disks display as having 1.15 MB total space.

- 720 kilobyte (K) disks display as having 713K total space.

MORE INFORMATION
================

While these totals may seem incorrect, File Manager is actually displaying the
exact amount of total disk space based on 1K actually being 1024 bytes and 1
megabyte being 1024K.

File Manager determines the amount of space on a disk by using the following
formula:

  (Allocation units * number of bytes in each allocation unit)/1024/1024

For example:

  1.44 Disk: (2847*512)/1024/1024 = 1.39013671875 megabytes

NOTE: Microsoft Windows 3.1 File Manager displays total disk space in kilobytes
rather than megabytes. As a result, 1.44 MB disks display as having 1.423K.

Additional query words: 3.1 3.11 win95 floppy winnt

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Keywords          :  
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW310 kbWinNTSsearch kbWinNTS310 kbWinNTS310search kbAudDeveloper kbWinNT310Search kbWinNTW310Search kbWFWSearch kbWFW310 kbWFW311
Version           : WINDOWS:3.1,3.11; winnt:3.1

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