I just got my 27" iMac back from the Apple Store, it got two new logic boards and two new ambient light sensors. They had issues fixing thing apparently. Anyways, upon booting the computer, no OS was found. I boot into disk utility mode and see the Fusion drive was broken. It asked if I wanted to fix or ignore it. Ignoring means no disk to install an OS. I fixed it, and now I see a drive of about 999,999MB (can't look at the moment, Time Machine backup running). I thought it was 1.1TB with the Fusion Drive. Can someone check and see what their system is reporting? Thanks.