Hi all! I just successfully installed an SSD into my late 2012/early 2013 27" iMac. Everything works flawlessly, as I had made a copy of the Macintosh HD via SuperDuper. Originally I had a 1 TB HDD with a Fusion Drive (128 GB SSD from Apple). I'm wondering what to do with this original SSD now. I wanted to use it for specific tasks, such as a scratch disk or maybe use it for Bootcamp with Windows 7. 128 GB should be enough (I also have a 3 TB Thunderbolt HDD in RAID1). When I open Disk tools (don't know the exact English word, as I use a Dutch OS X version) it says that the Fusion Drive is missing a disk. That's correct, as the 1,1 TB HDD is gone now and the 1 TB SSD is another volume (with a copy of the original disk). It's asking if I want to 'rebuild' the Fusion Drive. It's kind of vague what that means. I dont want to rebuild the Fusion Drive itself, I just want to use the 128 GB Apple SSD for other purposes. When I click 'Restore' (in Dutch 'Herstel') I get the following question: Are you sure you want to fix your system? Your damaged internal disks will be erased This sounds scary, as if my whole system will be erased. It says DISKS, so that could mean both the 128 GB Apple SSD and my 1 TB SSD replacement. Obviously I don't want to erase my 1 TB SSD - that's the OS X which I'm using now. Does anyone know what will exactly happen when you click 'Fix'? As mentioned, I want to format the 128 GB Apple SSD only, but this seems the only way to do it. There are probably more people here who replaced their HDD with a SSD while also having a Fusion Drive?