when I boot, holding down Option, my hard disk appears twice

When I boot, holding down Option, and the hard drive picker appears, my internal drive appears twice. Is that normal, and does it matter which one I click?

iMac with Retina 5K display, OS X Yosemite (10.10), 16 GB RAM

Posted on Nov 14, 2014 1:30 PM

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when I boot, holding down Option, my hard disk appears twice

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