Microsoft KB Archive/128794

= File Manager Displays Maximum Disk Space of 1.99 GB =

Article ID: 128794

Article Last Modified on 1/19/2007

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APPLIES TO


 * Microsoft Windows NT Advanced Server 3.1
 * Microsoft Windows NT Server 3.5
 * Microsoft Windows NT Workstation 3.1
 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Advanced Server 3.1
 * Microsoft Windows for Workgroups 3.11
 * Microsoft Windows 3.1 Standard Edition
 * Microsoft Windows 3.11 Standard Edition
 * Microsoft Windows 98 Standard Edition
 * Microsoft Windows 95

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This article was previously published under Q128794



SUMMARY
Windows NT and Windows 95/98 support the creation of primary partitions and logical drives that are larger than 2 gigabytes (GB). When you run File Manager in Windows version 3.1 or Windows for Workgroups version 3.11 to view a large Windows NT drive, the maximum disk space (available or total disk space) displayed is 1.99 GB.



MORE INFORMATION
Since Windows version 3.1 and Windows for Workgroups version 3.11 operate with MS-DOS, they are limited to a 16-bit FAT drive. The maximum cluster size for a 16-bit FAT drive is 64K, or 65,536 bytes (where 1K = 1,024 bytes). In addition, the maximum cluster size in MS-DOS is 32K, or 32,768 bytes. Therefore, the maximum logical drive size in MS-DOS is calculated as follows:

32K x 64K = 2,048 MB = 2 GB

Although the maximum disk space that File Manager reports is 1.99 GB in Windows version 3.1 or Windows for Workgroups version 3.11, you can still access data stored on the FAT, HPFS, and NTFS drives larger than 2 GB.

The maximum partition sizes under Windows NT are:

NOTE: 16 exabytes equals 18,446,744,073,709,551,616 bytes.

Additional query words: 3.10 3.11 wfw wfwg win3x prodnt two four file system high performance greater gb eb

Keywords: KB128794

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