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Microsoft KB Archive/103555

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Knowledge Base

Defrag Treats Lost Clusters as Unmovable Blocks

Article ID: 103555

Article Last Modified on 12/3/1999


  • Microsoft MS-DOS 6.0 Standard Edition
  • Microsoft MS-DOS 6.2 Standard Edition
  • Microsoft MS-DOS 6.21 Standard Edition
  • Microsoft MS-DOS 6.22 Standard Edition

This article was previously published under Q103555


Microsoft Defragmenter (Defrag) does not detect lost clusters during the defragmentation process. Defrag marks lost clusters as unmovable blocks ("X" on the drive map screen display) and then proceeds to move the data around them.

Additional query words: 6.22 6.00 6.20 allocation unit non-movable nonmovable

Keywords: KB103555