odroid@ODROID-H2:~$ sudo mkfs.ext4 /dev/md0
mke2fs 1.44.6 (5-Mar-2019)
Creating filesystem with 976628736 4k blocks and 244162560 inodes
Filesystem UUID: 100a470d-96f1-47d2-8cf0-a211c010e8b9
Superblock backups stored on blocks: 
	32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
	4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 
	102400000, 214990848, 512000000, 550731776, 644972544

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (262144 blocks): done
Writing superblocks and filesystem accounting information: done       

odroid@ODROID-H2:~$ sudo mkdir /media/storage
odroid@ODROID-H2:~$ sudo mount /dev/md0 /media/storage/