Software Update: MyDefrag 4.1.2

Jeroen Kessels released version 4.1.2 of his defragmenter MyDefrag on Sunday. Previously called JkDefrag, this program is no longer under an open source license, but is still free to use. MyDefrag has one download that automatically installs a 32bit or 64bit version and still has the signature DOS interface. The defragmenter is script-driven, and several default scripts are included with the installation, such as Slow Optimize, Fast Update, and Analyze Only. The following changes and improvements have been made in this release:


  • Deleted the LowMemoryUsage() setting. The program no longer caches the full paths of regular files. but still caches directories.
  • Added a new defragmentation algorithm, the old algorithm is now available as Defragment(Fast).
  • The list of fragmented files in the logfile will now show the count of wrap-around fragments, instead of the count of fragments.
  • Fixed a bug that would cause the “MyDefrag.debuglog” file to be created even if the “-d 0” commandline parameters was specified.
  • Added the SortByNewestDate() fileaction.
  • Fixed a bug that prevented MyDefrag from processing files that were encrypted by another userid than the userid that was running MyDefrag.
  • Fixed a bug in the AddGap() fileaction. It created gaps that were too big.
  • Added the IgnoreWrapAround Fragmentation setting.
  • Gaps are now also skipped by the wrap-around fragmentation analyzer.
  • Added the FastFill(WithShuffling) option.
  • Added some code to protect against circular folders.
  • Made some changes in how the screensaver will stop in various circumstances.
  • Changed the way that the !RunTime! macro is calculated.
  • Fixed a bug that could cause an infinite loop on very full harddisks when trying to move files out of the way (vacate).
  • Enlarged the width of short numbers from 7 to 11 characters.

Version number 4.1.2
Release status Final
Operating systems Windows 7, Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008
Website Jeroen Kessels
File size 1.60MB
License type Freeware