Using macOS Disk Utility: How to repair Fusion Drives, and using command-line

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https://appleinsider.com/inside/macos/tips/using-macos-disk-utility-how-to-repair-fusion-drives-and-using-command-line-utilities

There are a few final useful utilities in Apple’s Disk Utility you may not be aware of. Here’s how to use them the continued exploration of the macOS tool.
In the previous three installments of this series, we looked in-depth at how to use the macOS Disk Utility app, and how to use it to manage devices, volumes, RAID, and images – and how to repair disks.

In this final segment, we take a look at a few of the lesser-known Disk Utility capabilities: how to repair hybrid Apple Fusion Drives, and how to use macOS command line disk utilities in Terminal…

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BobbyB

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diskutil resetFusion apparently only works OSMojave and later, and will work if you replace your spinning rust with an SSD and the resident PCMIe drive, strangely performance overall is better if you run the existing PCMIe and New SSD in Concert as a Fusion Drive than running them both seperately as many upgrades advocate you do. In my observations noticebly faster. 2015 iMac 27′

One caveat however using that command will erase anything on the drive(s) fully and present you with a new freshly formatted APFS drive, be warned if you have a prized Win 10 or 11 or any other Partitions, it takes no prisoners.

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Alex5723

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I rebuilt the Fusion (128GB/1T) drive in my 2012 MacMini (Ivy Bridge i7 age) using this method:

https://support.apple.com/en-us/HT207584

There are two methods, one for Mojave or later and one for High Sierra and earlier. i don’t remember what OS I had at the time, but it really wasn’t that difficult.

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Alex5723

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