Existing users, 
DiskWarrior helped me in the past and was one of my most valuable utilities, but having somehow been unaware until now of the ability to use an updater to burn a new CD-ROM compatible with newer hardware or versions of the OS as described by the company spokesman below, I recently bought iDefrag, because it definitely does have a utility for creating new CD-ROM discs for new hardware and OS releases.
It's tempting to purchase an upgrade of DiskWarrior this time, as I never feel as though you can have too many utilities, but it appears as though this application is still mainly for repairing and optimizing (replacing) the directory, whereas iDefrag will optimize all of your hard disk data (like the extremely dangerous Norton Speed Disk) and replace the directory as DiskWarrior does.
Is there anything functionality in DiskWarrior that is not available in iDefrag (i.e., any problems that it can repair that iDefrag cannot)? If so, I'll consider buying an upgrade.
DiskWarrior
Maintain, repair, and recover system disk/drive data.
Version: 4.2
Comparison to iDefrag
Feedback Type: Commentary
Contributed by: Xiaopangzi Thursday, December 07 2006 @ 04:25 PM PST
Product Platform: MacOSX
Used Product For: Over One Year
Recommend Product: YES
Comments
Comparison to iDefrag - epc
If I recall correctly, it was not DW that did the optimization but rather another Alsoft utility; PlusOptimizer.I don't think it was ever updated for OS X, so under OS X I initially used Drive 10. Now I use Drive Genius, which includes many features including defragmentation and directory optimization.
Here's an older comparison chart. I don't know whether a newer one exists:
http://www.prosoftengineering.com/products/DG_comp_doc.pdf
Thursday, December 07 2006 @ 09:12 PM PST
Comparison to iDefrag - MacGuffin
I believe you're right but it was bundled with DW.Friday, December 08 2006 @ 08:15 AM PST
iDefrag does a completely different task from DiskWarrior - bewebste
iDefrag is a defragmentation utility. If files are split up into multiple pieces on your hard drive, iDefrag will shuffle the pieces around so they are all contiguous. This leads to faster drive performance, but does not solve any problems per se.DiskWarrior is a disk repair utility. It works on the directory of the drive that keeps track of the locations of all the files. If the directory is damaged, some files, or in bad cases the whole drive, may be inaccessible, and DiskWarrior can often save those lost files. In the process of repairing the directory, it also optimizes it, which can lead to a performance increase. DiskWarrior does not, however, move any of the files' actual data around on the drive.
Thursday, December 07 2006 @ 08:02 PM PST
iDefrag does a completely different task from DiskWarrior - bewebste
iDefrag is a defragmentation utility. If files are split up into multiple pieces on your hard drive, iDefrag will shuffle the pieces around so they are all contiguous. This leads to faster drive performance, but does not solve any problems per se.DiskWarrior is a disk repair utility. It works on the directory of the drive that keeps track of the locations of all the files. If the directory is damaged, some files, or in bad cases the whole drive, may be inaccessible, and DiskWarrior can often save those lost files. In the process of repairing the directory, it also optimizes it, which can lead to a performance increase. DiskWarrior does not, however, move any of the files' actual data around on the drive.
Thursday, December 07 2006 @ 08:08 PM PST
Comparison to iDefrag - cubeboy
For what it's worth: Apple and many Mac "expert" websites say defragmentation is unnecessary and irrelevant in OSX, since it does this on its own. So De-frag has no real value.Thursday, December 14 2006 @ 07:28 PM PST
Comparison to iDefrag - MacGuffin
If I'm not mistaken, DW's methods have a patent pending, hence it's unlikely that iDefrag is performing in a similar manner (unless they're looking to be sued for infringement, which I doubt). DW used to optimize disks in the OS 9 days and I'm not actually sure why this is no longer the case. TechTool Pro still does it, but I no longer trust them, especially since I had a lot of problems after an optimization.I've NEVER used Norton. They make stuff for Windows.
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Thursday, December 07 2006 @ 04:42 PM PST