It's the first time I had to replace a faulty drive. I replaced it for a larger disk (6To to 8To) and I also improved my setup by adding a SSD for cache but when the rebuild finished, the new drive is still unmountable and the data that was on the faulty drive missing. Is there still a possibility to retrieve it somehow? At the very least I have to understand what went wrong in order to avoid this in the future. I schedule a parity check every week and I let the faulty drive in, is it possible that the parity check corrected the parity by substracting the data that it was unable to read because of the faulty drive ? Here below the situation at this moment.