This article describes the meaning of the values in the Percent Complete status bar when you are running Disk Defragmenter.

The following table describes the meaning of the values in the Percent Complete status bar:

   Value      Description
   ----------------------------------------------------------------------
   0%-4%      Defrag is running a special version of ScanDisk for Windows
              to check for errors before doing anything with the disk.

   5%-9%      Defrag is making a "road map" of the best locations for the
              data on the drive which it will use when actually moving the
              files.

   10%-100%   Defrag is moving the data on the disk.
				

On a drive compressed with DoubleSpace or DriveSpace, the following meanings apply:

   Value      Description
   ---------------------------------------------------------------------
   10%-49%    This is the first optimization pass through the compressed
              file.

   50%        Defrag is checking the internal compression structures of
              the drive.

   51%-100%   This is the second and fastest optimization pass on the
              compressed file.
				

If the percentage jumps from 0 to 5 percent without any drive activity, the Check Drive For Errors option is probably not enabled.

The ScanDisk activity from 0 to 4 percent occurs only when Defrag is started. The ScanDisk activity is not repeated if Defrag is forced to restart because of disk activity.