Hello, this happened to me as well. I use Windows 10 and it happened after a Windows 10 update. The computer would reboot and then get an error. The ones that mounted were in RAW.
CHKDSK did not fix my issues, so I would be curious to know what you did specifically. I ended up having to destroy the volumes and recreate. Lost about 90TB of data in the cloud and I am restoring from backups. Was a massive pain.