Does swapping the controller chip within some ssd always imply data loss, or is it possible that all the relevant information (like translation layer parameters) is stored on the NAND chips?
I found some great article but it didn't mention how the translation layer is stored: https://adreca.net/NAND-Flash-Data-Recovery-Cookbook.pdf
The datasheet of the controller does not mention, whether it has internal memory, but it does mention, that the controller uses AES-encryption to store the data and is opal compliant.
I guess this implies that the key is not just stored on the NAND, as this would defeat the purpose of disk encryption (although I remember that some pentesters discovered the plain storage of the AES-key in some SSDs)
Note: Swapping identical controller chips on an Intel SSD 520 Series 240GB (SSDSC2BW240A3L) for example.