Error: -9899: The partition cannot be resized.
I get this error everytime I try to resize selected partition. It is 340 GB volume with 115 GB of free space. I tried to make it 250 GB and I got this error. Then I tried to make it 300 GB (only 40 GB smaller - it would have much free space after that) and again - I got this error. This is external HD connected by FireWire. Neither Disk Utility nor "diskutil resizeVolume" was able to resize it. I checked the volume - there is nothing to repair. What else can I do? How can I resize it?
MacBook (13-inch, Mid 2009), Mac OS X (10.6.6), iPhone 4 (iOS 4.2.1)