I have a 2013 iMac with a broken logic board and display. It's too expensive to repair, but I'd like to salvage the fusion drive. If I put the drive in an external case will it work?
A Fusion Drive is a combination of 2 drives, one Solid State (SSD) and the other a standard Hard Drive (HDD). You can remove the two drives and reuse them in enclosures as 2 separate drives.
No, the Fusion Drive will not work away from a Mac. The separate components can be formatted to work as stand alone drives but the core storage volume that we call a Fusion Drive will not function without OS X.
The data is gone once the Fusion Drive is busted. You cannot recover data once the drive components cease to be associated as a Fusion Drive.