root@jake-ThinkPad-W541:/home/test# mdadm --query /dev/sdc8
/dev/sdc8: is not an md array
/dev/sdc8: device 1 in 6 device undetected raid5 /dev/md/8.  Use mdadm --examine for more detail.
root@jake-ThinkPad-W541:/home/test# mdadm --examine /dev/sdc8
/dev/sdc8:
          Magic : a92b4efc
        Version : 1.0
    Feature Map : 0x0
     Array UUID : 647bf344:1fa055b2:250192e1:f58cf57e
           Name : vg:8
  Creation Time : Wed Apr  1 22:54:11 2015
     Raid Level : raid5
   Raid Devices : 6

 Avail Dev Size : 9749841648 (4649.09 GiB 4991.92 GB)
     Array Size : 24374602240 (23245.43 GiB 24959.59 GB)
  Used Dev Size : 9749840896 (4649.09 GiB 4991.92 GB)
   Super Offset : 9749841904 sectors
   Unused Space : before=0 sectors, after=1008 sectors
          State : clean
    Device UUID : 1f16d5b6:b82ce930:c52f61f7:df644373

    Update Time : Tue Jun  4 00:52:09 2019
       Checksum : c6070a4 - correct
         Events : 201

         Layout : left-symmetric
     Chunk Size : 512K

   Device Role : Active device 1
   Array State : AAAAAA ('A' == active, '.' == missing, 'R' == replacing)