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Announced on October 16, 2014, identifiable by the model number A1347 and EMC 2840.

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Unable to format new hard drive

Apple Mac mini "Core i7" 3.0 (Late 2014) Late 2014 - BTO/CTO - Macmini7,1 - A1347 -  2840

This one came in with a failing 1TB 2.5” hard drive. It also is set up as a fusion drive with a 128GB SSD blade. 16GB RAM.

I replaced the 1TB drive with a Crucial 1TB 500MMX SSD.

Had to boot the machine with the old 1TB standard drive attached via USB to SATA adapter. I am unable to format the new internal 1TB SSD drive. Tried an APFS format with Disk Utilities.

It is running Mojave. Do I need to break the fusion drive first?

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@mayer - You’ll need to run Disk Utility deleting all of the drives partitions (both the PCIe & SATA). Then reboot and run the internet recovery or use a prepped up USB OS installer. Just run the installer let it setup the drives.

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