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  1. #1


    Member Since
    Jan 24, 2010
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    8
    drive upgrade - partitioning error
    hi there,

    i have a current model macbook pro 13.3" running osx 10.6.2. it is my first mac and it is a great machine! however the standard 250gb hard drive is a little on the small side for me, so i purchased a 500gb hard drive as an upgrade.

    to get my data from the old 250gb drive to the new 500gb drive i used a borrowed diskjockey pro which copies the data across sector by sector to make an exact image - very easy! after using this tool i installed the 500gb hard drive and the machine booted up first time and works just like it did before.

    unfortunately, when i try to create a new partition in OSX's disk utility to take advantage of the extra space i get an error. it says 'partition failed with the error: the chosen file size is not valid for the chosen filesystem'. if i try to resize the existing partition to use up all of the available space i get a different error. it says 'partition failed with the error: mediakit reports partition (map) too small'.

    so at the moment i can't figure out a way of using the extra 250gb of space!

    it seems that this might be because of the way i copied the drive - because it copied everything off the 250gb drive sector by sector the partition table on the 500gb drive must think it is a 250gb drive?? indeed in the support section of the diskjockey website they say that it can be a problem and they offer a pretty straightforward method for fixing this with a windows machine... but nothing for a mac. grr, frustrating! but so easy to fix on a windows machine.

    sooooo.. can anyone help me please?? how do i fix up the partition table on this mac!?

  2. #2


    Member Since
    Sep 09, 2009
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    5,484
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    Back to my old 2.2GHz C2D MB after selling my MBP and wondering what my next Mac will be :)
    I don't know about disk jockey.... but I suggest going again, but this time using CCC Carbon Copy Cloner - Home or SuperDuper SuperDuper! to copy your drive.
    Then booting from the external HD with the clone, use whichever of those apps you used to clone back.

    When I say going again, I mean cloning from the original drive.

  3. #3


    Member Since
    Jan 24, 2010
    Posts
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    ...i don't have an external hard drive :/ it's essentially a software issue, so i'd rather not buy extra hardware and pull my macbook apart again to fix something that takes 30secs in windows!

  4. #4


    Member Since
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    Back to my old 2.2GHz C2D MB after selling my MBP and wondering what my next Mac will be :)
    I don't know how you got to where you did with the way you did it.... and what takes 30 seconds in "Windows" is another crash.
    It's not a software issue anymore.... you have no external drive with a backup (safeguard), so it is a user issue now!
    Any means of fixing your partition table (without a backup) is a risk of losing all it's contents if anything goes wrong.

  5. #5


    Member Since
    Sep 09, 2009
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    Down Under :D
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    Back to my old 2.2GHz C2D MB after selling my MBP and wondering what my next Mac will be :)

  6. #6

    bobtomay's Avatar
    Member Since
    Dec 22, 2006
    Location
    Texas, where else?
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    26,465
    Specs:
    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
    Using a duplicator that is designed for use with NTFS and their own support still only mentioning a MS operating system that is now two back, their own faq is at least 5 yrs old and they only tested it with XP. I can only wish you good luck at finding someone that has used it successfully with HFS.

    Your best bet is as 6string has recommended. It can be done for approx $20 with any number of kits similar to this. Great tool to have in your arsenal.

    And like 6string, I must strongly encourage you to set up a bootable backup device. From one that works on others crashed computers from time to time, I find it unreasonable that anyone would be averse to having their data backed up.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  7. #7


    Member Since
    Jan 24, 2010
    Posts
    8
    no need to preach to me about backups, i use online backups if all you are using as a backup is an external hard drive then i think it is you that should be worried! what if you drop it? if your house burns down?

    saying that the device is designed for NTFS is completely wrong - it copies the data sector by sector, so it doesn't even read the file system!

    and yup, it is still a software issue!! possibly the most frustrating thing about switching from a PC to a mac is that things work differently and you have to re-learn new ways of doing the same task! especially when people tell you that it's not possible!

    is it possible to boot from a windows install cd on a mac?? maybe i could boot into a windows install environment and use windows to fix the problem?

  8. #8


    Member Since
    Jan 24, 2010
    Posts
    8
    hmm, tried booting from windows cd.. windows didn't like that, so it didnt help!

    so is there any way to fix a partition table on a mac?

  9. #9

    chscag's Avatar
    Member Since
    Jan 23, 2008
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    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    Quote Originally Posted by dannnnn View Post
    hmm, tried booting from windows cd.. windows didn't like that, so it didnt help!

    so is there any way to fix a partition table on a mac?
    No way at all if you keep refusing to accept good advice.

    Regards.

  10. #10

    dtravis7's Avatar
    Member Since
    Jan 04, 2005
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    It's too bad that Disk Jockey only made the partition the size of the old drive and does not offer a way to use the whole space as one partition on the destination drive.

  11. #11


    Member Since
    Jan 24, 2010
    Posts
    8
    firstly, you haven't given me any advice.. so i'm not sure why you felt you needed to contribute. secondly, the only advice in this thread has been to make backups.. and i already do that.

  12. #12

    dtravis7's Avatar
    Member Since
    Jan 04, 2005
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    iMac 2010 27" QuadI7 OSX10.11, iMac 2008 OSX10.11, MBP Late2011OSX10.11 , iPad Air, iPhone 3GS
    Apple - Support - Discussions - Partition Resizing ...

    Maybe something here might help but read it carefully, the 3rd post in the thread looks like it might help. I have never tried anything they suggest so be careful.

  13. #13


    Member Since
    Jan 24, 2010
    Posts
    8
    yea dtravis it is the best thing and the most annoying thing about the device! you are guaranteed a perfect copy.. 250gb partition table and all! haha
    i just didn't realise it'd be such a PITA to fix a partition table with a mac

  14. #14


    Member Since
    Jan 24, 2010
    Posts
    8
    thanks for the link!
    i tried what it suggested, which was using diskutil in terminal.. this is what i get doesn't work

    Code:
    trout:~ dan$ diskutil resizeVolume disk0s2 100%
    Started partitioning on disk0s2 big hard drive
    Verifying disk
    Resizing
    Error: -9939: The partition cannot be resized.
    it's not looking that good lord help anyone who gets a corrupt partition table on a mac and doesn't have excellent backups!

  15. #15

    dtravis7's Avatar
    Member Since
    Jan 04, 2005
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    Specs:
    iMac 2010 27" QuadI7 OSX10.11, iMac 2008 OSX10.11, MBP Late2011OSX10.11 , iPad Air, iPhone 3GS
    If in OSX if you right click on the hard drive and click on Get Info what does it show?

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