Windows 95/98 Partition Types Not Recognized by Windows NT
This article was previously published under Q151414
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Windows NT does not recognize Windows 95/98 FAT32 partitions. There are currently no plans to create a FAT32 driver for Windows NT.
OEM versions of Windows 95 support four partition types for FAT filesystems that Windows NT does not recognize. The partition type can beidentified by the System ID byte in the partition table. This byte islocated at the following offsets:
0x1C2 = Partition 1 0x1D2 = Partition 2 0x1E2 = Partition 3 0x1F2 = Partition 4
The four values used by Windows 95 that Windows NT does not recognizeare as follows:
0x0B Primary Fat32 Partitions up to 2047 GB 0x0C Same as 0x0B, uses Logical Block Address Int 0x13 extensions 0x0E Same as 0x06, uses Logical Block Address Int 0x13 extensions 0x0F Same as 0x05, uses Logical Block Address Int 0x13 extensions
The FAT partition types that Windows NT version 3.X and 4.0 can recognizeare:
0x01 Fat12 < 10 megabytes 0x04 Fat16 < 32 megabytes 0x06 Fat16 > 32 megabytes 0x05 Extended (may be FAT, HPFS or NTFS)To work around this issue when you install Windows NT 4.0, make sure that both your boot partition and the partition you are installing to is either formatted with the FAT16 or NTFS file system, or is not formatted.
For more information about the FAT32 file system or troubleshooting Windows NT 4.0 Setup, click an article number below to view that article in the Microsoft Knowledge Base:
126690 Windows NT 4.0 Setup Troubleshooting Guide
154997 Description of the FAT32 File System
173694 Err Msg: ERROR: Setup Was Unable to Install the Boot Loader
3.10 3.50 3.51 4.00 prodnt
Article ID: 151414 - Last Review: 02/28/2014 08:03:32 - Revision: 3.1
Microsoft Windows NT Advanced Server 3.1, Microsoft Windows NT Workstation 3.5, Microsoft Windows NT Workstation 3.51, Microsoft Windows NT Workstation 4.0 Developer Edition, Microsoft Windows NT Server 3.51, Microsoft Windows NT Server 4.0 Standard Edition
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