What disk defragment program do you guys use?

Discussion in 'Mac Apps and Mac App Store' started by 5150 Joker, Nov 3, 2006.

  1. 5150 Joker macrumors member

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    Davis, California
    #1
    I'm new to the Mac/OSX platform and I haven't seen any mention of a popular disk defragment program yet. Anyone here have some suggestions?
     
  2. Warbrain macrumors 603

    Warbrain

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    Chicago, IL
    #2
    None because OS X does a basic defrag itself.
     
  3. 5150 Joker thread starter macrumors member

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    Oct 24, 2006
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    Davis, California
    #3

    I was reading that once the disk reaches around 80% full things start slowing down and a disk defrag program becomes neccessary even for OSX.
     
  4. Warbrain macrumors 603

    Warbrain

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    Chicago, IL
    #4
    Part of the reasoning that I think that could be right is that there isn't as much space for virtual memory then. But I've never read that anywhere. Someone might have more knowledge on that than me.
     
  5. ghall macrumors 68040

    ghall

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    Jun 27, 2006
    Location:
    Rhode Island
    #5
    I use iDefrag, though defrag is not really necessary unless your working with large files (I think it's over 40MB). OS X does have a built-in defragmenter, but even that needs a little help sometimes.
     
  6. markw10 macrumors 6502

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    Sep 4, 2006
    #6
    Do you have to defragment Hard Drives?

    I am used to having to Defragment hard drives on the PC. Is this necessary on the Mac and if so is there a good program to buy to do it or does this come with the computer?
     
  7. yellow Moderator emeritus

    yellow

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    Oct 21, 2003
    Location:
    Portland, OR
    #7
    From the horse's mouth, so to speak, and for what it's worth:

    http://docs.info.apple.com/article.html?artnum=25668
     
  8. mleary macrumors regular

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    Sep 13, 2006
    #8
    You only have to worry if you get down to 1GB or so available space so the OS can create new swap files if it needs to. OS X creates swap files in 80MB increments so even 1GB of available space should be fine.
     
  9. knome macrumors 6502

    knome

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    Sep 7, 2006
    #9
    onyX does optimizations but i think i heard somewhere that it is not necessary because of UNIX.
     
  10. WildCowboy Administrator/Editor

    WildCowboy

    Staff Member

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    Jan 20, 2005
    #10
    Wow...it's the day of defrag. A similar question was last asked an hour ago.

    Basically, unless you work with large files (like heavy video editing), there is no real need to defrag, as the OS automatically does it for small files.
     
  11. Eraserhead macrumors G4

    Eraserhead

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    Nov 3, 2005
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    UK
    #11
    Mac's automatically defrag small files but large files (>50MB or so) can still get fragmented, assuming you keep a decent backup it is actually quicker to just reformat your HD and restore it from backup than it is to run a defrag. (And it's pretty painless compared to windows too.)
     
  12. Transeau macrumors 6502a

    Transeau

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    Jan 18, 2005
    Location:
    Alta Loma, CA
    #12
    I love how people think that...

    Personally, I boot from an external drive and use iDefrag. It's the only one that cleans up the extents and btrees too.
     
  13. Warbrain macrumors 603

    Warbrain

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    #13
    It does, but it's not a hardcore defrag. It's just something basic.
     
  14. yellow Moderator emeritus

    yellow

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    Oct 21, 2003
    Location:
    Portland, OR
    #14
    And what's wrong with that? It happens to be true.

    This is incorrect.

    OS X (Tiger/Panther specifically, things were different in pre-10.3*), creates dynamically sized swap files.
    And they are based on normal computer bit sizes, 64MB, 128MB, 256MB, 512MB, 1024MB.. I've never seen them get any larger than 1GB.

    Code:
    ls -lh /var/vm
    total 2097152
    drwx--x--x   20 root  wheel       680B Oct 17 10:29 app_profile
    -rw------T    1 root  wheel        64M Oct 27 17:01 swapfile0
    -rw------T    1 root  wheel        64M Oct 31 12:05 swapfile1
    -rw------T    1 root  wheel       128M Oct 31 15:46 swapfile2
    -rw------T    1 root  wheel       256M Nov  1 15:01 swapfile3
    -rw------T    1 root  wheel       512M Nov  1 15:28 swapfile4
    
    And I would not suggest allowing your disk to fill to the point where you have 1GB left. If you have that little an amount of disk space, invest in an external drive or delete some pr0n. :)

    *: Pre-Panther swap sizes were static. I don't remember the exact sizes, but I think they were all in 64MB increments.
     
  15. Bern macrumors 68000

    Bern

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    Nov 10, 2004
    Location:
    Australia
    #15
    I've had Macs since the late 80's and have never defragged the HD. I do photo editing and digital artwork and have never had a problem. It's just another urban legend developed by Windows users and more so these days since more and more Windows users are going Mac.

    Having said that I had to defrag my HD for the first time last night... that is the Windows XP partition created from Bootcamp :p
     
  16. Bern macrumors 68000

    Bern

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    Australia
    #17
    No it's not.
     
  17. Warbrain macrumors 603

    Warbrain

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    Jun 28, 2004
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    Chicago, IL
    #18
    I would defrag in OS 9 just because it was part of the series of checks that Norton ran on the computer whenever I had issues, which seemed to be quite often.
     
  18. yellow Moderator emeritus

    yellow

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    Oct 21, 2003
    Location:
    Portland, OR
    #19
    Except... do they have a product to sell you? TechToolPro prehaps?
    Does it include a defrag util perhaps? Oh it does?
    Does it seem in their best interest to post something like this? Perhaps? :)

    Sorry, it's the cynical color in me. Yes, this article comes up a lot (it used to be a forum post, if I remember correctly).

    Ultimately, it's up to the user. A defrag ISN'T necesary. As noted in the article disks are so fast, that a defragged disk sometime only has the PERCEPTION of being "faster". But if you WANT or think you NEED a defrag, AFAIK, there's TTP and iDefrag out there. That's all.
     
  19. cube macrumors G4

    Joined:
    May 10, 2004
    #20
    According to what they wrote, if you leave 15% of the partition free you wouldn't have to buy anything.
     
  20. yellow Moderator emeritus

    yellow

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    Oct 21, 2003
    Location:
    Portland, OR
    #21
    Weeeellll not implicitly, but yes you could take that away from it...

    It's a bit misleading.
     
  21. cube macrumors G4

    Joined:
    May 10, 2004
    #22
    It's not about speed. It's about safety. It's harder to recover the data from a fragmented disk if it goes bad.
     
  22. yellow Moderator emeritus

    yellow

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    Oct 21, 2003
    Location:
    Portland, OR
    #23
    This is why we back up, no? If one has a good back up, there's no need to care about recovering data from a fragmented disk that go bad.
     
  23. cube macrumors G4

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    May 10, 2004
  24. Bern macrumors 68000

    Bern

    Joined:
    Nov 10, 2004
    Location:
    Australia
    #25
    OMG! In that case I better rush out today and spend all that money on TechTool Pro.....:rolleyes:
     

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