I made a bad late night mistake, I had full ntfs drives in my unraid (HP microserver) and I did not understand that parity sync is not merely a scan but basically a rebuild. It didn't say 'warning your data might be erased', but I had second thoughts and cancelled it after like a minute.
One of the drives was not yet started at all (hoping that one could be recovered in full), but I'd like to recover as much of my data as possible. I guess I misunderstood and thought that drives of other file systems could be read by unraid.
What are my options?