network attached storage – Mount software raid HDD on Ubuntu

Have two HDDs should be using RAID1 (or RAID0) from a broken WD LiveDuo NAS device.

Put them on a Ubuntu machine, and try to get the data back. But cannot find a decent way to mount the drive, like mdadm etc. Anyone has similar experience to share? Thank you.

sdb         8:16   0   3.7T  0 disk  
├─sdb1      8:17   0   1.9G  0 part  
├─sdb2      8:18   0   1.9G  0 part  
├─sdb3      8:19   0   489M  0 part  
│ └─md2     9:2    0   489M  0 raid1 
└─sdb4      8:20   0   3.6T  0 part  
sdd         8:48   0   3.7T  0 disk  
├─sdd1      8:49   0   1.9G  0 part  
├─sdd2      8:50   0   1.9G  0 part  
├─sdd3      8:51   0   489M  0 part  
│ └─md2     9:2    0   489M  0 raid1 
└─sdd4      8:52   0   3.6T  0 part  
  └─md127   9:127  0   3.6T  0 raid0