JkDefrag V3.36    Suggested by AlephX - Added on 21 Apr 2007 656KB (uncompressed) - Popularity score (6034) Website - Screenshot - Download - Comments (24) - Post comment - Permalink

Posted comments:

 stacoma: Works great, but for defrag of floppy disk and removable media you need to add its drive letter to the end of the command path or else JkDefrag automatically will skip these. [2006-12-16 16:39]

 Okra: Excellet defragmentor program. I like it very much. It can defrage the huge file that many program can not do. [2007-01-31 04:40]

 AlephX: Hi, Stacoma: look at http://www.emro.nl/freeware/ maybe it is interesting for your needs [2007-02-26 00:05]

 Bas: Emiel Wieldraaijer from Leeuwarden, Holland made a GUI for JkDefrag:
www.emro.nl/freeware [2007-02-26 00:16]

 Bas: Also check out Scandefrag:
http://www.blueorbsoft.com/scandefrag

ScanDefrag is a small windows application that configures Microsoft's, Norton's, or JKessel's disk utilities as part of the next Windows' startup process. This can result in less restarts and cleaner runs of these programs. [2007-04-25 08:02]

 Jose Melgar: The best defragmenter I can get, in addition is free.
Yesterday I downloaded this program, excellent to install and operate. The GUI interface almost unused is fast and new for me. Congratulations to Jeroen Kessers. Greetings. [2007-05-03 07:45]

 Vince_99: Integrated JkDefrag for all my drive letters into right-click menu with Fast Explorer (incl. -a 4 command) so defragging any drive (even USB drive) is only one click away [2007-06-05 05:53]

 AFOLock: re: GUI for JkDefrag - www.emro.nl/freeware

jkdefraggui.exe tries to connect to 83.136.192.154, port 80
(problabely for checking updates)
Found till yet no workable way to stop it via the Gui itself.
Have contacted the writer of the Gui about it. Maybe we hear from him. [2007-08-27 10:05]

 Fred: @AFOLock: In JKDefragGUI there is in tab Options, Check for updates on startup. [2007-09-01 02:35]

 AFOLock: re: GUI for JkDefrag - www.emro.nl/freeware

The layout of the Tab options in the GUI for JKDefrag "can" lead to confusion.
(for those wanting to check - If one (could) thinks its OFF it is in fact ON and vice versa - pls activate your firewall and check for your self the results)

In short -
the author (www.emro.nl/freeware)agreed to workout
a clearer confirmation about the update-status.

I have no doubts that we will see in short time an (minor) update of this otherwise nice GUI. [2007-09-03 08:05]

 Richard: I see NO REASON to defrag a USB drive. It is random access. [2007-10-04 06:15]

 Shodan: Absolutely correct about not defragging USB drives, Richard. In fact, USB manufacturers advise against it due to potential damage to the USB chip... [2007-10-07 03:33]

 Jerry: A USB harddrive is not random access. USB flash drive that are usually formatted to fat32 may need to be defragged as well. I have needed to defrag one when something went wrong in the middle of copying large files. [2007-10-07 09:49]

 Jerry: Fragmentation on large flash drive can lead to increased risk of failure and defragging can help prevent this. http://www.techworld.com/storage/features/index.cfm?featureid=2814 [2007-10-07 10:00]

 Simon.T: goto C:\Windows\System32 and search for JkDefragScreenSaver.scr JkDefragScreenSaver.exe (so... what is this?) [2007-11-03 13:08]

 Rob: Just setup the screensaver version and am already in love with this utility. Best defrag program ever! [2007-11-06 06:35]

 Re:Simon T.: I agree, it creates two files "jkdefragscreensaver" in Windows\System32, probabley a pseudo-screensaver which executes jkdefrag when the computer is idle. So it seems to mean that this is app' is neither stealth nor really portable... [2007-11-07 15:57]

 Banshee: So dont enable the screensaver, idiot. FFS I am so sick of the "its not stealth" whiners.....

Shit, what if the admins found out you were defragging!!! Man, sackable offence. The app is as portable as you want. Get a life. [2007-11-12 15:03]

 JDF: This app will remove restore points running under Vista. It is documented in the JKdefrag Forum by several users. No doubt this is a GREAT defragger, but I would caution anyone running Vista to steer clear of it until this bug is resolved. I have personally been burned by it wiping out my Vista restore points, then read that others experienced exactly the same thing. [2007-12-03 05:40]

 decomp: Not sure if you may call this "a bug" in JKDefrag. Actually, it's The Volume Shadow Copy function in Vista itself that interprets the writing/access actions of JKDefrag as changes of the files, and bloating the storage space for restore points doing so. You probably encounter this problem not on larger disks with larger storage spaces. 15% of 250GB is a lot more then 15% of 80GB!
I agree JKDefrag needs to enhance the program an make it shadow-copy-aware as Diskeeper did as an example. Every defragger "for Vista" has to tacle the hurdle of communication with the Volume Shadow copy Service (VSS).
You're right of course people should be aware of the situation. [2007-12-04 05:20]

 Impressed: JK Defrag is fantastic. Best defragger i've ever used. Preferred over Auslogics and by far over windows integrated one. Keep up the great work John! [2007-12-27 17:22]

 Simon.T: RE:Banshee - ROFLMFAO :)

true... true... [2008-02-03 03:51]

 Beau: I have tried several defraggers and have no idea how well they are doing their job. Just how does one know? I have used Auslogics Disk Defrag non-portable for a quite a while and it is much faster than JKDefrag, which I also run from my hard drive. Is a slower speed an indicator of more thorough defragging? [2008-06-29 04:02]

 Shodan: Just ran V3.36. It totally removed ALL of my Windows Update history under Vista! Other defraggers do NOT do this. JkDefrag has done this forever, as far as I can tell. PLEASE FIX THIS TERRIBLE BUG! [2008-10-01 12:22]

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All HTML tags will be removed from your comment. URLs (http, https, ftp) will be automatically detected and hyperlinked. I reserve the right to delete irrelevant, frivolous or offensive comments. For more general topics (eg. whether apps that write to the registry, leave traces on the host machine, rely on certain versions of IE etc. can be considered portable), please post to the Portable Freeware Discussion forum. If your virus scanner has detected a virus in the application, please email the author directly or post to the forum. Note that false positives (i.e. flagging a virus when there is actually none) are extremely common for virus scanners. When in doubt, try an online scanner like Online Malware Scanner or VirusTotal, which scans files using multiple anti-virus engines. It is very likely to be a false positive if only a few engines raise the red flag.