Unable to merge split Fusion Drive

I have a 2019 21" iMac

--> diskutil resetFusion

Internally-located hardware disk device known to the currently-running macOS:

Rotational (disk1)

Volumes exported by partitions or storage systems hosted on the above device:

APPLE SSD SM0032L Media (disk2s1)

APPLE HDD HTS541010A9E632 (disk3s1)

Your computer must have exactly 1 solid-state and 1 rotational disk drive

iMac 21.5″, macOS 10.14

Posted on Jul 13, 2021 8:21 AM

Similar questions

Fusion Drive - Is that drive split or not ? Hi, second hand bought iMac late 2015 with Monterey, supposed to have both ssd 128gb and 2tb hdd.. First time on fusion, is that splitted or not? Should I fix this according to this or not? How to fix a split Fusion Drive - Apple Support Thanks in advance
1638 3
Fusion drive split? Hello, I just factory reset my imac. I first deleted 2 pations HD and Hd data in disk utility. Then I reinstalled macOS Catalina. I got a choice when installing, what disk do you want to install on, HD or HD data? I chose HD data. Now when I look at storage I see two similar disks, exact same size but with different names. Is this a split fusion drive?
715 4
Split Fusion Drive issue I have a 21,5 inch 4K iMac with 1TB Fusion Drive but since I reinstalled (and messed about with the partitioning) my iMac takes 4 minutes to boot and once inside everything is slower than a tortoise and no fun to play with. I've been looking for solutions for weeks and have now stumbled on a support article called How to Fix a Split Fusion Drive where it states "If your Fusion Drive appears as two drives instead of one in the Finder, it's no longer working as a Fusion Drive." This is the case with my Mac. The article goes on to say: Choose Apple () menu > About This Mac, then click Storage. If you see a drive labeled Fusion Drive, your Fusion Drive is working and this article doesn't apply to you. If you have a Fusion Drive that has been split, you should see two drives. One of them should be labeled Flash Storage, with a capacity of 24GB, 32GB, or 128GB. The other should be at least 1TB. which is also the case with my iMac It goes on to say that this can be fixed by following these steps: Turn on your Mac, then immediately press and hold Command-R to start up from macOS Recovery. Release the keys when you see the Apple logo or spinning globe. When you see the macOS Utilities window, choose Utilities > Terminal from the menu bar. Type diskutil resetFusion in the Terminal window, then press Return. Type Yes (with a capital Y) when prompted, then press Return. Only ... Terminal comes back telling me that I have no SSD I can't make head or tail of this and my iMac is so slow I could kick it's teeth in :-( Can anyone shed some light on this? Here's the System Report screenie: And here's the Storage screenie:
2324 12

1 reply

rkaufmann87

Level 10

148,494 points

Jul 13, 2021 9:33 AM in response to Unknown06

Please take the computer to your local AASP.

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Unable to merge split Fusion Drive

Welcome to Apple Support Community

A forum where Apple customers help each other with their products. Get started with your Apple Account.

Learn more Sign up