Then you can launch Boot Camp Assistant and install Windows 10 again. In the Partition tab, click the + button. Erase the Fusion drive (because your stuff might not fit on a downsize partition). To partition a Fusion drive: Backup your stuff (two backups strongly recommended). Then you have to either backup the OS X partition with Time Machine, rebuild a vanilla Fusion Drive and finally restore the TM backup or install OS X from scratch after rebuilding a vanilla Fusion Drive. Shown below are two partitions of the Fusion drive in Disk Utility. Your OS X volume usually isn't affected though. However, after consulting the internet tubes, I discovered a consensus that no one really knew what the heck it was. trying to remove/resize a Boot Camp partition with Disk Utility) the resizeStack command often fails with a cryptic -8xxxx error message because some internal CoreStorage structures are corrupted. When Apple announced the Fusion Drive, I assumed it was just a hybrid SSD drive. " choose a slightly smaller size like 1021500m or 1021g.Īfter poking around with Disk Utility or the Windows Disk Management tool (e.g. You can try to resize the whole Core Storage stack with the command with: diskutil cs resizeStack lvUUID size. To reinstall Windows with Boot Camp Assistant you have to restore the ~vanilla Fusion Drive state.
Open the Disk Utility window and select the drives where the partitions exist. Your Windows partition isn't missing after erasing it! You gained some unallocated disk space. Open Disk Utility and select the hard drive whose partition you want to resize. I did a dumb thing while messing around with Boot Camp and managed to lose a partition that I had made earlier to install Windows on to.Ī 300GB partition is now missing and I've tried everything since this morning to get it back but I clearly lack the knowledge and I need my Mac for school work.ĭo you have any suggestions on how I can restore the lost partition without a backup?Ģ: Apple_CoreStorage Macintosh HD 699.4 GB disk0s2ģ: Apple_Boot Recovery HD 650.0 MB disk0s3Ģ: Apple_CoreStorage Macintosh HD 23.6 GB disk1s2ĬoreStorage logical volume groups (1 found)