Article ID: 139515 - Last Review: November 15, 2006 - Revision: 1.1

Defrag Cluster Size Changes When 50 Percent Finished

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SUMMARY

When you run Disk Defragmenter on a compressed volume, the Show Details screen shows the system cluster size changing from a uniform size to varying sizes after Disk Defragmenter is 50 percent finished.

MORE INFORMATION

When you run Disk Defragmenter on a compressed volume, you see uniform boxes on the Show Details screen until Disk Defragmenter is 50 percent finished. After 50 percent, you see boxes of various sizes. This occurs because Disk Defragmenter is defragmenting the actual physical hard disk during the first 50 percent, and the compressed volume during the second 50 percent.

You see boxes of different sizes because of the way Disk Defragmenter reflects how files are stored on an uncompressed drive and on a DriveSpace compressed volume.

For additional information about clusters and DriveSpace, Please see the following articles in the Microsoft Knowledge Base:
67321  (http://support.microsoft.com/kb/67321/EN-US/ ) FAT Type and Cluster Size Depends on Logical Drive Size

98407  (http://support.microsoft.com/kb/98407/EN-US/ ) How DoubleSpace Uses Sector Allocation
APPLIES TO
  • Microsoft Windows 95
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