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EDITOR NOTES
Note: The demo only works on 100MB drives and smaller.
DESCRIPTION
iDefrag helps defragment and optimize your disk for improved performance. Features include:
- Supports HFS and HFS+ (Mac OS Extended).
- Supports case sensitive and journaled filesystems.
- Supports adaptive hot file clustering (“Hot Zone”).
- Four powerful defragmentation algorithms:
- Compact data, moving all free space to one place.
- Optimize filesystem metadata.
- On-line defragmentation.
- Defragment whilst your disk is mounted.
- Advanced programmable optimization.
- Rearrange your disk the way you want.
- B-Tree metadata file compaction/optimization support.
- High performance user-defined file classification engine.
- Per-block and accurate whole disk display.
- Detailed statistics so you know whether you need to optimize.
- Inspector allows you to view details of individual extents/files.
- Quickly jump to specific files to examine them in more detail.
- Altivec accelerated display for improved performance.
- Auto-update feature ensures you always have the latest version.
- Fine-grained security, just like iPartition.
- AppleScript support.
WHAT'S NEW
Version 1.6.9:
- Fixed a problem introduced in 1.6.8 where iDefrag was unable to
move hard link folder files in “Quick (on-line)” mode.
- Added compatibility for PGP whole disk encryption.
- Updated the error messages for the on-line defrag routine.
- Prevent iDefrag from appearing to hang on completion when DNS is
misconfigured (obviously it's better to fix your DNS settings...).
REQUIREMENTS
Mac OS X 10.3.9 or later.
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| iDefrag User Reviews (128 posts) | Write A Review |
 | Jun 10 2009 |
TIMBARNES Any software that deals with the low-level structure of your computer's file system has to be 1000% robust. Errors and crashes are an absolute no-no for these kinds of utilities. Unfortunately, I have had a number of hangs while using iDefrag's latest version, and I've also seen file system corruption that has required me to run utilities like DiskWarrior to repair the file system. So while I think there may well be a case for doing defragmentation from time to time, I can't recommend this application.
(Version 1.6.9) | |
| [ Reply ] | |
 | Jun 8 2009 |
HARV I am not (yet) an iDefrag user, and my knowledge/understanding of defraging/optimization is nil, so I well understand if my question is off base. SuperDuper allows me the option to erase a drive/volume prior to copying the backup. Doesn’t the erasing accomplish the same thing? I know iDefrag has more bells and whistles (some are of no benefit to me) and it may defrag faster, but as I use/schedule SuperDuper while I sleep, I see no advantage there. So for folks such as me, why use iDefrag? No offense is intended to the developers, I just don’t understand.
(Version 1.6.9) | |
| [ Reply ] | |
| Jun 8 2009 |
DOM21 What exactly does the "on-line" in "on-line defragmentation" mean? Does it make your hard drive viewable or accessible to Coriolis in any way? If not, then what does it mean?
(Version 1.6.9) | |
| [ 3 Replies - Reply ] | |
Replies:
| Jun 8 2009 |
NORAA Normally when a HD is defragmented by iDefrag it needs to be unmounted. Thus you can't defrag your startup volume. "Quick (on-line)" means that the HD can be defragmented while still mounted, including your startup volume. This method only defrags individual files however, and doesn't defrag free space (a full disk optimization).
(Version 1.6.9) | |
| Jun 8 2009 |
DOM21 So is Coralis using the term "on-line" in a non-traditional sense? On-line normally means connected to the Internet.
(Version 1.6.9) | |
| Jun 15 2009 |
FAHLMAN On-Line means the Hard Drive is mounted.
(Version 1.6.9) | |
| Jun 8 2009 |
SHOTGUNWEDDINGS Where's the iDefrag 1.6.9 demo? I download from here it is 1.6.8 and I download from Coriolis website same thing. 1.6.8 demo did not work for me. Kept hanging when I launched it. It would go into a endless loop looking for drives. eMac PPC with 10.5.7
(Version 1.6.9) | |
| [ Reply ] | |
Replies:
| Jun 7 2009 |
NAOH It depends what you mean 'work with'. The short answer is 'yes'. iDefrag will defragment the data on a RAID. iDefrag will treat a RAID as just another disk. The task of mirroring or striping the information on the disks is usually handled by the RAID controller or the disk drivers in the OS. Since iDefrag doesn't take over from those, it can't see the inner workings of the RAID, and therefore is unaware of the exact nature of the disk. Instead, like most disk defragmenting tools, it will look at the data blocks as they are presented by the OS, and work with that.
(Version 1.6.9) | |
| May 14 2009 |
DANNY365 I have recently purchased iDefrag to help my PowerBook 12'' *60 GB* disk survive after several years of moderate use. The disk was about half full, and I suspected it caused some slowing down. The app. worked fine for me (nothing special, 2 hour job after booting from the disk the supplied app. created.) I do sense some quickening, not dramatic, though. I would still buy the app. not to take the risk of a fragmented disk.
(Version 1.6.8) | |
| [ Reply ] | |
 | Mar 22 2009 |
DRDUL As a previous reviewer noted, running iDefrag on a Mac with Time Machine enabled results in Time Machine backing up many of the defragged files. Too bad I didn't realize this before I ran iDefrag. Time Machine is now backing up a whopping 371 GB of files, none of which have actually changed. My 1 TB Time Machine volume was full, which means I have now lost a whole bunch of backups from several months ago so that Time Machine can squeeze in 371 GB of not-at-all-new files. Because of this, I will no longer be using iDefrag. I'd rather have a fragmented disk and keep my old backups.
(Version 1.6.8) | |
| [ 1 Reply - Reply ] | |
Replies:
| Mar 23 2009 |
DRDUL A follow-up to my earlier report. I contacted Coriolis technical support, who indicated that Time Machine should not be re-backing up defragged files. They indicated that following a similar report they received earlier, they tested this and were not able to reproduce the problem I experienced. So, as always, YMMV.
(Version 1.6.8) | |
| Mar 18 2009 |
Note: The demo only works on 100MB drives and smaller." Is that so?! Who has such a drive? Even my USB stick has 1GB ...
(Version 1.6.8) | |
| [ Reply ] | |
| Mar 18 2009 |
NOTAFOOL This application has yet to complete a single defragmention job for me successfully. On every occasion the process "freezes" about halfway. A message appears at the foot of the application stating that it is "Allowing disk to cool" and "Temperature 56.0 C". But it never seems to resume the job. I have to quit it, to reclaim my computer. What on earth is it that is going on ? I have NEVER encountered anything quite so bizarre with any other defragmenting program that I have used, and am starting to wonder with iDefrag is in fact a total lemon. Can anyone advise me what the heck is going on here ? It is very disappointing indeed. I am using an iMac G5 2.4 GHz Intel Core 2 Duo, running Mac OSX Version 10.5.6
(Version 1.6.8) | |
| [ 3 Replies - Reply ] | |
Replies:
 | Mar 18 2009 |
DOM21 Just curious: did your trouble begin with this latest version, 1.6.8? Or previous versions too?
(Version 1.6.8) | |
| Mar 20 2009 |
L0XBY i had a similar problem with 1.6.6 where it would just stall, show the spinning beach ball and require a hard reboot to restart idefrag. haven't tried 1.6.8 yet.
(Version 1.6.8) | |
 | Jun 7 2009 |
ANONYMOUS The problem here is probably that you have the temperature parameters set incorrectly in iDefrag's Preferences panel. Some disks are quite capable of operating at up to 60°C (possibly in a few cases even higher), whereas others are not; the default values in iDefrag's Preferences panel are, necessarily, conservative. You can find out what the maximum operating temperature for your drive is either by looking up the serial number (in Disk Utility or System Profiler) and sending it in to us, or by looking on the hard drive manufacturer's website. Alternatively, and obviously at your own risk, you can disable the thermal monitoring feature in Preferences.
(Version 1.6.8) | |
| Feb 27 2009 |
JGROVE The best (by far) MAC defrag program on the market.
(Version 1.6.7) | |
| [ Reply ] | |
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