To cut the story short, While cMP4,1 was at sleep (i thought it was off), i removed Lion OS X HDD and put in a El Capitan OS X SSD... System woke up to Lion desktop (with El Cap SSD) and froze. I've shut it down and afterward SSD only shows 10.11.6 Recovery Partition. OS Partition (diskXs2) is shown in Disk Utility as unmounted, named diskXs2 and there is nothing that can be done with it. Any trick or software that can rebuild disk scheme and make it usable again or do i have to erase the whole SSD and start over? Any help is greatly appreciated, since I would really like to save few folders from the drive.