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ITsVISTA KB-Link: KB2471430

You cannot restore large files in the NTFS file system when all the data streams that have sparse attributes are deleted in Windows Server 2008 or in Windows Vista

Consider the following scenario:

  • You restore large data files in an NTFS file system on a computer that is running Windows Server 2008 or Windows Vista.
  • All the sparse data streams of the files are removed.
  • The sparse attribute of the files are not removed.
  • The left sparse attribute information is large enough to exceed the restoring limitation of the NTFS file system.

In this scenario, the restore operation fails, and the data in the data files is lost. Additionally, the following events are logged in the System log:

Event Type: Warning Event Source: Ntfs Event Category: None Event ID: 50 Computer: <Computer name> Description: {Delayed Write Failed} Windows was unable to save all the data for the file. The data has been lost. This error may be caused by a failure of your computer hardware or network connection. Please try to save this file elsewhere.

Additionally, the following event is logged in the Application log:

Event ID: 26 Category: None Source: Application Popup Type: Information Machine : <Computer name> Message: Application popup: Windows - Delayed Write Failed : Windows was unable to save all the data for the file <file name> The data has been lost. This error may be caused by a failure of your computer hardware or network connection. Please try to save this file elsewhere.

There is a download that resolves this issue. See Hotfixes for details.
32-bit Download: Contact Microsoft
64-Bit Download: Contact Microsoft

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB2471430.

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