I had this exact problem three years ago. My software RAID was over a raw device, not a partition, and when I got new hardware for a home file server that had b

I had this exact problem three years ago. My software RAID was over a raw device, not a partition, and when I got new hardware for a home file server that had been running for seven years, the new motherboard wiped the superblock. I was able to recover most of the data with some data recovery tool. Unfortunately, some of the files were research data where the filename was significant, and I lost all filenames and paths during recovery.