Knowledge Base

Stop 0x23 Errors in Fastfat.sys

Article ID: 142628

Article Last Modified on 11/1/2006

Microsoft Windows NT Workstation 3.51
Microsoft Windows NT Server 3.51

This article was previously published under Q142628

SYMPTOMS

A STOP 0x00000023 FAT_FILE_SYSTEM error message occurs when a floppy disk is inserted or removed while Windows NT 3.51 is in the process of shutting down.

CAUSE

The version of Fastfat.sys distributed with Windows NT 3.51 has the potential of showing the above symptom. There is a very small window of time while Windows NT is mounting a FAT volume, such as a floppy disk, during which a request to determine whether or not it is safe to unmount the same volume may cause the above error.

WORKAROUND

Install Service Pack 5 or later for Windows NT 3.51.

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 3.51. This problem was corrected in the latest Windows NT 3.51 U.S. Service Pack. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: prodnt

Keywords: kbother KB142628