Hot answers tagged disk-utility
Boot into Recovery from the USB. Instead of opening Disk Utility, open Terminal instead. Run the command diskutil list to see that your drive is being recognised. It should list two disks, one being your bootable drive, the other your SSD, and provide you with a disk identifier (such as disk0). If it doesn't show up, check that you have installed it ...
Disk1 is a "virtual device" which resides in disk0s2 (the Apple_CoreStorage Volume Group which actually contains a FileVault volume). You have only one 'physical device' indeed. Disk0s5 is probably an old Bootcamp installation. The clean way (get rid of the 2 Recovery HDs): Make a complete Time Machine backup of Macintosh HD. Start to Internet Recovery ...
This should do the trick: In Terminal: diskutil eraseDisk MS-DOS <newname> <diskID> where is the new name for the disk and is the disk identifier (you can find this by getting the disk info from Finder or Disk Utility, or by typing "diskutil list" into Terminal).
Boot holding Command ⌘ R at the chimes to boot into Recovery Mode, run Disk Utility & Repair Disk.
There is no need to delete the CoreStorage Logical Volume Group. Just resize it: Have a backup! Reboot into Internet Recovery Mode (hold Option-Command-R) as the machine is restarting). You'll eventually be presented with a Max OS X Utilities window. In the menu bar along the top of the screen, click Utilities -> Terminal. At the prompt, enter ...
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