invalid raid superblock

https://ubuntuforums.org/showthread.php?t=900406 mount: unknown filesystem type ‘LVM2_member’ https://blog.sleeplessbeastie.eu/2012/05/08/how-to-mount-software-raid1-member-using-mdadm/ https://www.nas-forum.com/forum/topic/57264-raid-shr-hs/