Free (released under the GNU General Public License) disk defragment and optimize utility for Windows 2000/2003/XP/Vista/X64. Completely automatic and very easy to use, fast, low overhead, with two optimization strategies, and can handle floppies and USB disks/sticks. Included are a Windows version, a commandline version (for scheduling by the task scheduler or for use from administrator scripts), a screensaver version, a DLL library (for use from programming languages), and versions for Windows X64. JkDefrag is based on the standard defragmentation API by Microsoft, a system library that is included in Windows 2000, 2003, XP, and Vista. All defragmenters are based on this API, including commercial defragmenters. JkDefrag is therefore very solid and there is no risk of losing data. You can stop the program at any time, it will finish the current file in the background. If your disks use NTFS then you're even safe when the computer crashes in the middle of defragging. Nevertheless, it's still a good idea to backup before defragmenting, just like with other defragmenters, because the heavy use of the harddisk may trigger a hardware fault.
Changes in this version:
- Different method of starting the alternate screensaver, in the hope it will work for more users.
- Added the "%SystemRoot%" folder to scan for screensavers.
- Added a "2003" test to filter out non-standard screensavers.
- Added zero to the choices in the "do not defrag if last run was less than ... hours ago" in the screensaver configuration window.
- Bugfix: if more than one disk was specified on the commandline, and the program was stopped by the user during any but the last disk, then the program would close the window, finish the current file, and start processing the next disk in the background. It will now close the window and finish the current file.
- Different method for determining the LCN of a file, in the hope it will fix a looping problem with compressed files during optimization.
- Made a change in the method used to defragment huge files to reduce the number of midway fails, and make it faster.
- Added debug level 6 for detailed gap-finding messages.
- The "Analyzing disk", "Starting defragmenter for", and "Finished" messages are now written to the logfile.
- For DLL users: Added a parameter to the ShowMove() callback.
- For DLL users: extra message 46.
Download: JkDefrag 3.5 Download: JkDefrag 3.5 (Windows x64)
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View: JkDefrag Home Page
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