space gone after failed partitioning process. I lost 500 gb and can't recover it.

pavadebo wrote:

Hi, space on my hd has gone after failed partitioning process. I interrupted the process and after that my boot drive lost 500 gb which i wanted to use for boot camp. Now i can't recover it. Used diskutil resize volume, but get error message about wrong size on the cs and advice to do whole repair. : The provided Core Storage logical volume has an incorrect size; you should run whole-disk repair

The message is correct. Boot into Internet Recovery (Command+Opt+R during power-up) and click on Utilities -> Disk Utility, click on the outermost disk and click First Aid or Repair.

You have disk space outside the CoreStorage volume that BC Assistant created. Please see Re: failed windows 8.1 installation through bootcamp on how backup/restore the system using TM.

The simplest and safest method to get your disk space back is

1. Backup OSX and all your files - Use Time Machine to back up or restore your Mac - Apple Support .

2. Boot into Internet Recovery (Command+Opt+R) - OS X: About OS X Recovery - Apple Support .

3. Click on Utilties -> Disk Utility and Erase your internal whole disk. This is the outermost Fusion disk. You can also do the same in Utilities -> Terminal using diskutil commands and rebuild the Fusion drive.

4. Restore OSX and your files - Use Time Machine to back up or restore your Mac - Apple Support .

This requires a separate external disk which can accommodate TM backup - Backup disks you can use with Time Machine - Apple Support .

Recovery Console should build it properly. Post the diskutil cs list before you start the restore for verification. If it does not work, I can provide terminal commands to do this.

You need to boot into Internet Recovery (Command+Opt+R), because Local Recovery (Command+R) is running from your internal Recovery HD partition and you cannot erase the disk since Recovery HD is running from it.