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Update HDD portion of Fusion Drive

Hi,

I have a mid 2012 Macbook Pro that I converted to a Fusion Drive setup, 512GB SSD and 2TB HDD. My HDD is starting to make a bit of noise and the machine is running as well as it might. I was going to replace the HDD, but does anyone know if I can remove the HDD and clone it to the new drive without having to split the “Fusion” first?

Thanks

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Nope! You’ll need to break the fusion drive set first.

The steps I would do:

  • Prep the new drive with a fresh OS install from the OS installer.
  • Use the Migration Assistant to move your user accounts, apps & data over from your fusion drive (or HD alone).
  • Brake Fusion Drive
  • Swap out HDD drive with new HDD
  • Rebuild Fusion Drive set

Keep in mind your SSD data is a copy of your HDD stuff! It is not important in the swap out. The only issue is the linage of the two drives so the system knows you have a Fusion Drive set.

I personally don’t use cloning apps any more I find they tend to make more of a mess. This is true with the newer OS’s as they still don’t support APFS. I would also recommend you stick with MacOS Sierra for now and when the next point release of Mojave which hopefully fixes the compatibility issues with the older 2012 models.

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