I have a 2015 iMac 27" retina whose Fusion Drive split into separate drives whilst attempting to fix a partition table issue prior to upgrading to macOS Big Sur.

I have a fully functioning BOOTCAMP partition with Windows 10 on the HDD drive.

If I run diskutil resetFusion to rejoin the Fusion Drive's SSD and HDD, will it destroy my BOOTCAMP partition?


Yes, all partitions on the SSD and HDD are destroyed by running diskutil resetFusion.

This is explained clearly after running the command; when it asks for confirmation.

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