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I'm trying to make a Fusion Drive with a Samsung 830 256GB SSD and a 3 TB 3.5" HDD (connected via SATA to my late 2012 Mac mini). I'm able to create the Fusion Drive, but when I start to install Mountain Lion, it fails because it's unable to create a recovery partition. I have tried Fusion with a 640 GB or 1 TB hard drive, everything is working fine. Only the 3 TB (either Seagate or Western Digital) doesn't work: it can't create the Recovery partition.

Why could this be?

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What were the instructions you followed to create the fusion drive, and what errors are you seeing? –  Kevin Chen Jan 7 '13 at 7:48

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