I have a 2 TB Fusion Drive in a 5K iMac (Late 2015). Two days ago, I started the bootcamp assistant to create a partition for Windows 10. It got stuck (let it run 30 minutes), however, which forced me to reboot the machine. After booting, I lost 164 GB from my Fusion Drive.
I googled and found a solution, which states to boot into recovery and run
diskutil cs resizeStack <LGVID> 0g, which I did. However, I am not able to let it resize, because it immediately throws an error. Following the error does not work either.
I also tried repairing the disk with Disk Utility which runs for a few minutes, then says everything's fine. Nothing changed of course.
What can I do now?