I have an Intel MacPro in which I recently installed a new internal 3TB hard disk.
I attempted to format it in Disk Utility using the standard GUID partition map and encountered a strange problem. Disk Utility formatted it using a Logical Volume Group (LVG) instead of GUID.
Furthermore, Disk Utility subsequently refused to allow me to reformat or repartition this drive. The Partition Layout drop-down in Disk Utility is greyed-out. I seem to be stuck with a LVG drive.
Model: MacPro Quad Core (Early 2009/Nehalem MacPro4,1)
System: OS X Mountain Lion 10.8.5
Disk Utility: Version 13 (450)
Hard Disk: Seagate Barracuda ST3000DM001 3TB
How can I remove the Logical Volume Group partition scheme and reformat this drive in the GUID standard recommend by Apple?