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:
- Bugfix for the "-u" commandline option. All the "-u" masks were accidentally also processed as "items".
- Files are now classed as a SpaceHog when their last access time is more than 30 days ago.
- Deleted the "full" optimization "-a 4". For backward compatibility the program still accepts the option, but does exactly the same as for "-a 3".
- The screensaver will now not start if it detects that the computer is running on battery power.
- Deleted the code that disables the Windows display idle timer (screen saver) and system idle timer (power saver) in the commandline and screensaver versions.
For programmers:
- Deleted message 57 from the message array.
- Changed the meaning of the "Data->Phase" variable used by the ShowStatus() callback.
- The ShowStatus() callback is now executed once for every zone in the "-a 3" and "-a 7"..."-a 11" optimizations.