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Hotfix Data Written After Unsuccessful Non-Cached Read

This article was previously published under Q219299
This article has been archived. It is offered "as is" and will no longer be updated.
When a non-cached read request is unsuccessful on an NTFS partition that uses Windows NT disk-mirroring, the Windows NT fault tolerant disk driver may write hotfix data (0xFF) to the partition.
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:
For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows NT version 4.0 Service Pack 5.

Article ID: 219299 - Last Review: 11/02/2013 23:57:00 - Revision: 4.0

Microsoft Windows NT Workstation 4.0 Developer Edition, Microsoft Windows NT Server 4.0 Standard Edition, Microsoft Windows NT Server 4.0 Enterprise Edition

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