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:
- Added a wrapper program to the screensaver. The alternate screensaver would not start for some users and this will hopefully fix the problem.
- Action 5 "Force together" added. This mode will move all files to the beginning of the disk, even if it means fragmenting them. It fills all the gaps with fragments taken from the highest files.
- A change in the code that determines if a file is fragmented, to reduce the number of files that are uneccesarily moved.
- Debug mode 5 has been split into mode 5 "Detailed gap-filling messages" and mode 6 "Detailed gap-finding messages".
- Fixed a bug that caused a logfile to be created with a single line of text (the version info) when the "-l" commandline option was used.