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Fusion Drive SSD Unformatted

Long story but I was forced to pull the HD out of my 2015 iMac just to clone it with another iMac. I put the HD back in and everything is working fine. I just noticed in Disk Utility that the internal SSD (Apple SSD SM0128G Media PCI Internal Physical Disk • GUID Partition Map) is "Unformatted". Does this mean the machine is not using this drive at all?

MacBook Pro 15″, macOS 10.14

Posted on Jan 20, 2021 8:55 AM

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Posted on Jan 20, 2021 11:19 AM

It appears that your Fusion Drive is "split." That is, it is no longer working as a Fusion Drive, i.e., a combination SSD & HDD logical drive.


See if the following article can help: How to fix a split Fusion Drive - Apple Support


Ref: About Fusion Drive, a storage option for some Mac computers - Apple Support

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Fusion Drive SSD Unformatted

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