lweileman

Q: how to do a disk defragment on a mac book

How do i do a disk defragment on my mac book pro

MacBook Pro

Posted on Jan 23, 2012 1:45 PM

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Q: how to do a disk defragment on a mac book

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  • by Shootist007,

    Shootist007 Shootist007 Sep 21, 2012 4:59 AM in response to davscanlon
    Level 6 (16,660 points)
    Sep 21, 2012 4:59 AM in response to davscanlon

    davscanlon wrote:

     

    I meant to say SSD's don't fragment as they use flash cells, so don't have to be read sequentially as apposed to a disk?

     

    I mis-used the word "digital", i meant "flash technology"

    SSD do fragment just like any other type of drive and this also happens on Mac computers. But with SSDs you aren't supposed to DeFrag them as it can have detrimental effect on there life span. SSD flash memory only has a certain number of Writes before it fails. SSDs have wear leveling were data is not written to the same part of the drive over and over. It is written to the complete drive before it goes back and re-writes to a section that has been written to already.

     

    Oh and pay no attention to CSound1. His main purpose on this forum is to brake peoples balls.

  • by davscanlon,

    davscanlon davscanlon Sep 21, 2012 5:06 AM in response to Shootist007
    Level 2 (220 points)
    Sep 21, 2012 5:06 AM in response to Shootist007

    Ok, cheers for that buddy. I got his humour lol

  • by Appleknower,

    Appleknower Appleknower Jan 4, 2013 11:57 AM in response to lweileman
    Level 1 (0 points)
    Jan 4, 2013 11:57 AM in response to lweileman

    If you have a hard drive and it is not HFS+ formated, then the best way to do it is using Drive Genius 3 to defragment the hard drive. If you are only using the drive on a mac only, consider formating it to HFS+. This will ensure all the data is defragmented. Even if you occasionally you it with Windows, then use Macdrive on Windows to read/write on a HFS+ drive

  • by Csound1,

    Csound1 Csound1 Jan 4, 2013 12:11 PM in response to Appleknower
    Level 9 (51,166 points)
    Desktops
    Jan 4, 2013 12:11 PM in response to Appleknower

    Appleknower wrote:

     

    If you have a hard drive and it is not HFS+ formated, then the best way to do it is using Drive Genius 3

    Drive Genius 3 will not defragment drives that are not HFS+, so that won't work at all.

     

    Did you try this before recommending others to waste time and money?

  • by PHodara,

    PHodara PHodara Feb 16, 2013 8:22 AM in response to OrangeMarlin
    Level 1 (0 points)
    Feb 16, 2013 8:22 AM in response to OrangeMarlin

    I beg to differ with you I think the general consensus is that a Mac is a computer.

  • by Network 23,

    Network 23 Network 23 Feb 16, 2013 12:07 PM in response to lweileman
    Level 6 (12,043 points)
    Mac OS X
    Feb 16, 2013 12:07 PM in response to lweileman

    lweileman wrote:

     

    How do i do a disk defragment on my mac book pro

    The more important question is "why do you want to defragment?" For example, if you are having a performance problem on a Mac, defragmenting is probably not one of the top 10 things that will solve the problem, unlike a PC.

  • by bonimac,

    bonimac bonimac Feb 18, 2013 3:44 PM in response to lweileman
    Level 1 (24 points)
    iTunes
    Feb 18, 2013 3:44 PM in response to lweileman

    hi guy's, i'm having a discussion on an dutch forum with a guy who claims he is a Apple Certified Technician and am looking for the truth about this issue.

    He claims: OS X needs 10 to 15 percent free disk space, otherwise auto-defragment won't work.

     

    googling for more info in this i found sources like

    macrumors guide saying: having at least 10 GB of free space (after a restart) would help for normal usage.

    Another source (about Mac's) writes: you should have at least 15 percent free as bare minimum.

     

    I can bring my question down to: is it gigabyte or percent ?

    it means a Hugh difference.

    Keeping 15 percent free at least on a 3TB drive means 450 GB.

     

    Another way to put my question is:

    How much free space does OS X need to do his automatic disk defragment?

  • by Csound1,

    Csound1 Csound1 Feb 18, 2013 3:47 PM in response to bonimac
    Level 9 (51,166 points)
    Desktops
    Feb 18, 2013 3:47 PM in response to bonimac

    It's 15 percent until you reach 10G, then it's enough.

  • by bonimac,

    bonimac bonimac Feb 18, 2013 4:06 PM in response to Csound1
    Level 1 (24 points)
    iTunes
    Feb 18, 2013 4:06 PM in response to Csound1

    This means you don't now the answer i assume...

    I hope somebody has the anwer.

  • by John Galt,

    John Galt John Galt Feb 18, 2013 4:14 PM in response to bonimac
    Level 9 (50,142 points)
    Mac OS X
    Feb 18, 2013 4:14 PM in response to bonimac

    You assume incorrectly. That answer is as credible as any you are likely to find. Ask your Apple Certified Technician for documentation to support his claim of any particular minimum percentage. Please post the reference in a reply.

    Keeping 15 percent free at least on a 3TB drive means 450 GB.

     

    That illustrates the reason that 10 GB is approximately correct... "for normal usage".

  • by bonimac,

    bonimac bonimac Feb 18, 2013 4:21 PM in response to John Galt
    Level 1 (24 points)
    iTunes
    Feb 18, 2013 4:21 PM in response to John Galt

    thx for making this clear!

    may i conclude 'for normal usage' includes OS X's auto-disk defragment?

  • by Csound1,

    Csound1 Csound1 Feb 18, 2013 4:25 PM in response to bonimac
    Level 9 (51,166 points)
    Desktops
    Feb 18, 2013 4:25 PM in response to bonimac

    bonimac wrote:

     

    This means you don't now the answer i assume...

    I hope somebody has the anwer.

    I gave you a useable answer but all you have is attitude I'm out.

  • by bonimac,

    bonimac bonimac Feb 18, 2013 4:32 PM in response to Csound1
    Level 1 (24 points)
    iTunes
    Feb 18, 2013 4:32 PM in response to Csound1

    sorry Csound1, but i could'n do anything with your answer. Can you translate it please.

    Sounds to me like: it's 15 euro's until you reach 10 dollars, then it's enough.


  • by bonimac,

    bonimac bonimac Feb 18, 2013 4:37 PM in response to Csound1
    Level 1 (24 points)
    iTunes
    Feb 18, 2013 4:37 PM in response to Csound1

    double post deleted. Don't know how to delete post totaly.

  • by Csound1,

    Csound1 Csound1 Feb 18, 2013 4:39 PM in response to bonimac
    Level 9 (51,166 points)
    Desktops
    Feb 18, 2013 4:39 PM in response to bonimac

    bonimac wrote:

     

    sorry Csound1, but i could'n do anything with your answer. Can you translate it please.

    Sounds to me like: it's 15 euro's until you reach 10 dollars, then it's enough.


     

    15 percent free, once that 15 percent equals 10G (or more) you have enough free space for the OS to do it's job, more may be better, less will be worse.

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