So if your device is showing a Fusion Drive, it should only show the 1 drive, even though it is in fact 2. The Fusion Drive, is basically a specialized “RAID” configuration. Which in essence here means the OS sees it as one drive even though it is fact two. At in the About this Mac menu. If you use more detailed breakdowns like the System Info app or diskutil in terminal, it may reveal the truth of the matter (I don’t remember honestly)–there are two drives in your iMac.
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So if your device is showing a Fusion Drive, it should only show the 1 drive, even though it is in fact 2. The Fusion Drive, is basically a specialized “RAID” type configuration. Which in essence here means the OS sees it as one drive even though it is fact two. At least in the About this Mac menu. If you use more detailed breakdowns like the System Info app or diskutil in terminal, it may reveal the truth of the matter–there are two drives in your iMac.
I have not ever had to clone a disk proper when it comes to fusion drives. But I can’t imagine it wouldn’t work. Really the Flash storage is intended as a cache drive and nothing more. Depending on the exact stuff you’re trying to preserve, doing a Time Machine backup and then restoring the back up to the macOS install on the new drive may serve your purpose. It leaves the vast majority of things intact and you don’t need any additional software since Time Machine, and Migration assistant are built into macOS.
The only thing I will mention here, is that you’ll want to be sure to reformat the flash storage as part of the upgrade. You may even want to make that the drive your OS lives on and use the 2 TB as a data only drive, depending on the size of the drive that’s there. That will throw a wrench in the cloning idea, but it’s food for thought.
So if your device is showing a Fusion Drive, it should only show the 1 drive, even though it is in fact 2. The Fusion Drive, is basically a specialized “RAID” configuration. Which in essence here means the OS sees it as one drive even though it is fact two. At in the About this Mac menu. If you use more detailed breakdowns like the System Info app or diskutil in terminal, it may reveal the truth of the matter (I don’t remember honestly)–there are two drives in your iMac.
I have not ever had to clone a disk proper when it comes to fusion drives. But I can’t imagine it wouldn’t work. Really the Flash storage is intended as a cache drive and nothing more. Depending on the exact stuff you’re trying to preserve, doing a Time Machine backup and then restoring the back up to the macOS install on the new drive may serve your purpose. It leaves the vast majority of things intact and you don’t need any additional software since Time Machine, and Migration assistant are built into macOS.
The only thing I will mention here, is that you’ll want to be sure to reformat the flash storage as part of the upgrade. You may even want to make that the drive your OS lives on and use the 2 TB as a data only drive, depending on the size of the drive that’s there. That will throw a wrench in the cloning idea, but it’s food for thought.