Help with Fusion Drive

[Sankel]

Hey everyone,

I’ve already posted this a few days ago. Nobody answered, so I try to explain it a little bit better what my problem is.

I have a iMac 27” with the 3TB Fusion Drive. When arrived, I wanted to install Windows, with Boot Camp. After setting up, Windows kept freezing and eventually crashing upon start.

So I tried to install Windows without Bootcamp, erased my HDD and manually made the partitions. While doing this, I also created a partition to host Ubuntu Linux.

My hopes were that Windows stopped crashing on start, but it didn’t made any difference.

Now Boot Camp, off course, can’t delete the partitions in macOS. And I think I screwed my Fusion Drive a little bit. I disconnected the Logic Volume Group (or something like that) And I have no idea how to reset everything.

I have already back upped my entire system. So I don’t need anything from my HDD.

—

When in Recovery mode, I tried to enter: diskutil resetFusion. But that didn’t work. I think because I disconnected the HDD from the SSD.

Here's my diskutil list in macOS

 

[Fishrrman]

If you want to get things fixed...

1. Back up (you've already done that)
2. Boot to internet recovery (command-OPTION-R at boot) -- DO NOT boot to the recovery partition!
3. You may need your wifi password for internet recovery. It will take a while to load
4. When you get to the Mac OS utilities, quit the OS installer if it's open.
5. Open Disk Utility
6. In the upper left of DU's window, be sure that "show all devices" is selected
7. Now ERASE the internal drive. You want APFS, with the GUID partition format.
8. Once erased, quit DU and re-open the OS installer.
9. Install a clean copy of the OS. This may involve one or more reboots and will take some time. BE PATIENT
10. When done, you will be at the OS "setup screen". You can use setup assistant to "migrate back" your Mac OS stuff, or else re-install it manually.

I WOULD NOT recommend that you re-install BootCamp. If you need to use Windows, I suggest "an emulated solution" such as VMWare Fusion or Parallels. Things will go better that way.

 

[Sankel]

If you want to get things fixed...
I WOULD NOT recommend that you re-install BootCamp. If you need to use Windows, I suggest "an emulated solution" such as VMWare Fusion or Parallels. Things will go better that way.

Is there an particular reason why you wouldnt suggest Boot Camp? I use it for 3D-modeling (and sometimes a game) so emulating isn't a real option..

Thanks for your answer!