Disk Utility - Solution for a Weird MediaKit Partition "too small" Error

I found a very suggestive article, could be a silver bullet for this kind of problem.
*http://ubuntuforums.org/showthread.php?t=760190*
+*quote from SWedd*+
+In my case, it was caused by the Apple_Bootstrap partition (created during Ubuntu install), of format unknown to OSX. This partition was positioned right after my Macintosh_HD partition. To enlarge my Macintosh_HD I needed to use diskutil to erase the Apple_Bootstrap partition to a blank "MS-DOS" partition. Then I could use Disk Utility to Delete the MS-DOS partition. After that I could resize my Macintosh_HD freely.+
In my understanding, if you failed to increase the size of a certain partition, it might mean a partition just after that partition is corrupted or broken (whether or not it is corrupted, you can know it by using command "diskutil info ...").
With command "diskutil eraseVolume ..." you can erase the partition in question, then with "diskutil mergePartitions ..." merge the partition you want to increase in size and the partition you just erased. Now you can increase the size without any error.
Anyway, diskutil can do several things which Disk Utility can't do.
To resort to diskutil is sure worthwhile.
Message was edited by: Shigerello

Welcome to the Apple forums and thanks for the information.
Warning:
The terminal command
diskutil
should be used with care, as with most terminal commands.
A good rule to remember is "If you do not know what something will do, do not do it."
For information on diskutil, in a terminal enter
man diskutil

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    Message was edited by: terpfan

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