Sadly, Apple has not updated the Core Storage section on the developers web site with Fusion Drive running with Mojave. The Man page doesn't offer any help either.
Yes, you do need to break the Fusion Drive set before altering things otherwise the drives will be confused. In this case you also need to keep in mind you can't run the system with a dual SSD Fusion Drive set it won't really make things faster.
I haven't played with Mojave Fusion Drive setup yet my self so I don't know if Apple has any magic behind the scenes.
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FYI - Mojave APFS is different from High Sierra APFS so I doubt down grading work work.
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FYI - Mojave APFS is different from High Sierra APFS so I doubt down grading would work.
Sadly, Apple has not updated the Core Storage section on the developers web site with Fusion Drive running with Mojave. The Man page doesn't offer any help either.
Yes, you do need to break the Fusion Drive set before altering things otherwise the drives will be confused. In this case you also need to keep in mind you can't run the system with a dual SSD Fusion Drive set it won't really make things faster.
I haven't played with Mojave Fusion Drive setup yet my self so I don't know if Apple has any magic behind the scenes.
FYI - Mojave APFS is different from High Sierra APFS so I doubt down grading work work.