Microsoft KB Archive/935111

= Shadow copies of a volume may be lost when you defragment the volume by using Winternals Defrag Manager =

Article ID: 935111

Article Last Modified on 6/22/2007

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APPLIES TO


 * Winternals Defrag Manager 3.0
 * Winternals Defrag Manager 4.0

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SYMPTOMS
You create shadow copies of a volume. Then, you defragment the volume by using Winternals Defrag Manager. However, some or all the shadow copies may be lost.

Note The oldest shadow copy may be lost first, and then other shadow copies may be lost successively.



CAUSE
This problem occurs because the Shadow Copy provider cannot distinguish disk defragmentation from regular disk write operations if the file system's cluster size is smaller than 16 KB.



RESOLUTION
To resolve this problem, format a disk volume by using a cluster size that is 16 KB or larger.



MORE INFORMATION
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

312067 Shadow copies may be lost when you defragment a volume

Additional query words: 30220 shadow copy

Keywords: kbtshoot kbexpertiseinter KB935111

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