Something
public text v1 · immutabledephtu@dephtop:~$ sudo mdadm -E /dev/sda1; mdadm -E /dev/sdb1
mdadm: No md superblock detected on /dev/sda1.
mdadm: cannot open /dev/sdb1: Permission denied
dephtu@dephtop:~$ sudo mdadm -E /dev/sda1; mdadm -E /dev/sdb1
mdadm: No md superblock detected on /dev/sda1.
mdadm: cannot open /dev/sdb1: Permission denied