Mac disk utility repair failed volume is already unmounted

MAC DISK UTILITY REPAIR FAILED VOLUME IS ALREADY UNMOUNTED HOW TO
MAC DISK UTILITY REPAIR FAILED VOLUME IS ALREADY UNMOUNTED FREE
MAC DISK UTILITY REPAIR FAILED VOLUME IS ALREADY UNMOUNTED MAC

MAC DISK UTILITY REPAIR FAILED VOLUME IS ALREADY UNMOUNTED FREE

Now youвЂ™re free to do whatever you want with this empty disk.

Select the Fusion Drive and run First Aid on it.ДЇirst Aid will immediately create a Logical Volume and format it, leaving one bigВ partition of typeвЂќOS XВ Extended (Journaled)вЂќВ named вЂњUntitledвЂќ.

Quit Terminal.app and run Disk Utility from the main вЂњOS X UtilitiesвЂќВ app.Дisk Utility should show вЂњFusion DriveвЂќ without any partitions in it, which is expected since we just created the Logical Volume Group without any Logical Volumes in it.

MAC DISK UTILITY REPAIR FAILED VOLUME IS ALREADY UNMOUNTED MAC

On my Mac MiniВ it took about a minute to finish.Дiskutil cs list you should see just aВ Logical Volume Group and as manyВ Physical Volumes as you added (which is two in my case, disk0s2 and disk1s2), without any Logical Volumes yet. stuff to include theВ partitionsВ that diskutil said it erased & mounted in the prior step. diskutilВ will print things about erasing the physical partitions that made up the logical volumes, which in my case were /dev/disk0s2 (a 931GB partition on theВ internal hard disk) and /dev/disk1s2 (a 113GB partition on the internal SSD).В Pay attention to theВ names of theВ devices that it just liberated on your system, since youвЂ™ll useВ those device namesВ in the next step.ДЄt this point you have twoВ empty HFS+ partitions that are not a Fusion drive anymore, so youвЂ™ll want to rebuild the LVG from those two physical partitions.Дiskutil cs create 'Macintosh HD' / dev / disk0s2 / dev / disk1s2 and adjust the /dev/. LAST WARNING: FROM HERE ON OUT THIS DELETES ALL OF THEВ DATA ON THE HFS+ LOGICAL VOLUMEВ (but itВ doesnвЂ™t delete the recovery partition).Дiskutil cs delete FOO - BAR - BIZ - BAZ, where FOO-BAR-BIZ-BAZ was your lvgUUID.ThatвЂ™s the Logical Volume GroupвЂ™s universally unique identifier, a.k.a. Using the mouse, copy the long alphanumeric string thatвЂ™s on the thirdВ line of output after вЂњLogical Volume GroupвЂќ. (Maximize the terminal window that opens so itвЂ™s easier to see the output of the next step.)Дiskutil cs list.

From the Utilities menu of the вЂњOS X UtilitiesвЂќ app, open Terminal.If you have gotten to this article you have probably already been into Disk Utility a few timesВ already without success, so donвЂ™t open Disk Utility. Boot theВ recovery volume, which will take you to an OS X Utilities page that shows four options: вЂњRestore From Time Machine BackupвЂќ, вЂњReinstall OS XвЂќ, вЂњGet Help OnlineвЂќ, and вЂњDisk UtilityвЂќ.Only do this if youвЂ™re completely ready to just burn it all down to the ground and start over with a blank boot disk. The magic incantation that fixed it was inspired by instructions I found here:

MAC DISK UTILITY REPAIR FAILED VOLUME IS ALREADY UNMOUNTED HOW TO

Recovery mode was OK but couldnвЂ™t erase the boot volume nor mount it via Disk Utility (I just got вЂњUnable to delete the core storage logical volumeвЂќ), so reinstalling seemed impossible.ДЇortunately, I figured out how to do it, using some help from a StackExchange post I found.В See below for the details.

Nothing would make it boot normally again. My Mac Mini w/ Fusion Drive (thatвЂ™s a hard disk and an SSD pretending to be a single volume for better performance) froze and wouldnвЂ™t boot.

Mac disk utility repair failed volume is already unmounted