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Ubuntu newbie question. Similar questions are asked here but that relates to motherboard and here, but that does not address "mounting" issues.

I have one disk of a 2 disk raid1 array that failed in the raid device. The manufacturer and subsequent investigation indicates it is formatted as a linux disk.

fdisk -l displays

Device       Start        End    Sectors   Size Type
/dev/sdb1       41       1953       1913 956.5K Microsoft basic data
/dev/sdb2 ...
...
/dev/sdb9  6504448    8503295    1998848   976M Microsoft basic data
/dev/sdb10 8503296 7814035254 7805531959   3.6T Microsoft basic data

I run

sudo mount /dev/sdb10 /media/seagate

and get

mount: /media/seagate: unknown filesystem type 'linux_raid_member'.

Following the advice here I ran

sudo mdadm --assemble --run /dev/md0 /dev/sdb10

producing:

mdadm: /dev/sdb10 is busy - skipping

mdadm --examine produces

         Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : e733e938:772dc035:5c104e46:4d4fe2da
           Name : BA-001075384F44:8
  Creation Time : Wed Apr 24 18:37:09 2013
     Raid Level : raid1
   Raid Devices : 2

 Avail Dev Size : 7805529911 (3721.97 GiB 3996.43 GB)
     Array Size : 3902764819 (3721.97 GiB 3996.43 GB)
  Used Dev Size : 7805529638 (3721.97 GiB 3996.43 GB)
    Data Offset : 2048 sectors
   Super Offset : 8 sectors
   Unused Space : before=1968 sectors, after=273 sectors
          State : clean
    Device UUID : b8ca69f9:bba3bbc2:33f7033e:67308d4f

    Update Time : Fri Dec 14 13:54:41 2018
       Checksum : a891168f - correct
         Events : 2


   Device Role : Active device 0
   Array State : AA ('A' == active, '.' == missing, 'R' == replacing)

One final question was posted here but according to @Ian, the question was never answered satisfactorily.

I am at an impasse it seems. Can anyone point me in the right direction for mounting this partition and (hopefully) recovering the data on it?

Thanks in advance.

Well, made some headway. Used these instructions and I can see the LVM both in terminal window and in GUI interface.

But then:

mount /dev/vg8/lv8 /mnt/sd1 

Generates: “Wrong fs type, bad option, bad superblock on /dev/mapper/vg8-lv8, missing codepage or helper program, or other error”

Followed the advice and used

mkfs.ext4 /dev/vg8/lv8  

But got message

/dev/vg8/lv8 contains a ext4 file system
  last mounted on /shares/public on Tue Sept 16 20:00:52 1975
Proceed anyway? 

JerryFrey suggested using a file recovery such as foremost. But don't I have to mount the partition first?

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