Getting /home/ubuntu/NAS: unknown filesystem type 'LVM2_member' - Accessing files on a synology NAS drive

I'm trying to follow this https://kb.synology.com/en-uk/DSM/tutorial/How_can_I_recover_data_from_my_DiskStation_using_a_PC#x_anchor_encryptedvolume sudo -i apt-get update apt-get install -y mdadm lvm2 mdadm -AsfR && vgchange -ay mdadm: Found some drive for an array that is already active: /dev/md/brayc:2 mdadm: giving up. mdadm: No arrays found in config file or automatically cat /proc/mdstat Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md127 : active raid1 sdb3 3902196544 blocks super 1.2 [2/1] [_U] lvs mount /dev/md127 /home/ubuntu/nas mount: /home/ubuntu/nas: uknown filesystem type 'LVM2_member'. dmesg(1) may have more information after failed mount system call But I have problems when I run the mount command