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Windows 95/98 Partition Types Not Recognized by Windows NT
Article ID: 151414 - View products that this article applies to.
This article was previously published under Q151414
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 file systems that Windows NT does not recognize. The partition type can be identified by the System ID byte in the partition table. This byte is located 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 recognize are 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 recognize are:
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.
0x01 Fat12 < 10 megabytes 0x04 Fat16 < 32 megabytes 0x06 Fat16 > 32 megabytes 0x05 Extended (may be FAT, HPFS or NTFS)
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:
(http://support.microsoft.com/kb/126690/EN-US/ )Windows NT 4.0 Setup Troubleshooting Guide
(http://support.microsoft.com/kb/154997/EN-US/ )Description of the FAT32 File System
(http://support.microsoft.com/kb/173694/EN-US/ )Err Msg: ERROR: Setup Was Unable to Install the Boot Loader
Article ID: 151414 - Last Review: January 30, 2007 - Revision: 3.1