I installed a second drive (Samsung 830 SSD/256 GB) in my Mac Mini (mid mode, 2.6 GHz, 16 GB RAM) using iFixIts second harddrive kit. Mechanical installation was without problems (except for that damned antenna...). The Mini runs ML 8.1.2 from the HDD. Then a series of strange events started: 1. Upon regular boot from the HDD the new SSD was not visble in diskutil, so I bootet into recovery mode 2. Recovery mode showed the HDD, but it was marked as damaged and I could only select "Fix". After that the HDD's data was erased, so I deleted it and reinstalled ML. The SSD was not visible, though 3. After reboot the SSD was still not visible in ML, so I rebooted again in recovery mode and... 4. Voila ! The SSD was visible. So I installed ML on it with success but... 5. Unfortunately the SSD was not visible as a bootable device. So I reinstalled ML several times on it, but things didn't change. I could always install ML on it, but it was not marked as bootable. 6. Booting again in recovery mode showed a drive with 1.25GB which is the combined capacity of my HDD and my SSD. So it seemed that ML for some reason created a fusion drive from it (actually I was never asked to do so) 7. I booted again into recovery mode and used diskutil coreStorage to split the fusion drive. Since then my SSD is invisible and I can't revive it again. Currently I'm lost. No idea how to proceed. I removed the HDD again, but the SSD is not visible any more. Checked and rechecked the plugs. Everything seems to be ok. The SSD is not defective, as I put it into my old Thinkpad (which takes 1 minute on the notebook btw. compared to 30 minutes in the "desktop" Mini). The cable is ok, too, as the SSD has already been shown. Any ideas before I kick that crappy little box out of the window ?