odroid@ODROID-H2:~$ sudo mdadm --detail /dev/md0
/dev/md0:
           Version : 1.2
     Creation Time : Mon Jun 17 18:08:26 2019
        Raid Level : raid6
        Array Size : 3906514944 (3725.54 GiB 4000.27 GB)
     Used Dev Size : 976628736 (931.39 GiB 1000.07 GB)
      Raid Devices : 6
     Total Devices : 6
       Persistence : Superblock is persistent

     Intent Bitmap : Internal

       Update Time : Mon Jun 17 18:27:08 2019
             State : active, resyncing 
    Active Devices : 6
   Working Devices : 6
    Failed Devices : 0
     Spare Devices : 0

            Layout : left-symmetric
        Chunk Size : 512K

Consistency Policy : bitmap

     Resync Status : 8% complete

              Name : ODROID-H2:0  (local to host ODROID-H2)
              UUID : d4759dbb:65fd2b07:d5f4f9c3:0fba55cc
            Events : 253

    Number   Major   Minor   RaidDevice State
       0       8        1        0      active sync   /dev/sda1
       1       8       17        1      active sync   /dev/sdb1
       2       8       33        2      active sync   /dev/sdc1
       3       8       49        3      active sync   /dev/sdd1
       4       8       65        4      active sync   /dev/sde1
       5       8       81        5      active sync   /dev/sdf1