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A free GUI solution to resizing disk partitions
Authored by: RobK on Feb 26, '08 08:42:19AM

In Tiger, the Disk Utility GUI does allow you to repartition a drive but it is a DESTRUCTIVE repartition (meaning that all your data will be lost!).

But in Tiger starting in 10.4.6, you can use the "diskutil resizeVolume" command in the Terminal to NON-DESTRUCTIVELY resize a Mac supported partition. (ie You SHOULD not lose any data but backup just to be on the sage side)

Don't expect to read the Man Pages on this command. Apple has NOT updated the man pages (still true in 10.4.11). But if you type "diskutil resizeVolume" in the terminal, you will get the details on how to use this command.

If you want a GUI on Tiger, use GParted. It is a GREAT Linux tool which is really a PartitionMagic Clone. Just boot the CD and use the GUI. Gparted Supports MANY more Filesystems than Apple's Disk Utility GUI or the diskutil resizeVolume command.

If you are on Leopard, you can use the new Disk Utility GUI which is supposed to support NON-DESTRUCTIVE partitioning. But I do not know how good it is.

Bottom Line - Repartitioning ANY Drive is risky no matter what OS you are using. It is always a good idea to back up your data on a DIFFERENT physical drive before attempting to repartition. Better be Safe than Sorry!



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