root ~ $ udisksctl mount -b /dev/sdb
/dev/sdb /dev/sdb1 /dev/sdb2
root ~ $ udisksctl mount -b /dev/sdb
Object /org/freedesktop/UDisks2/block_devices/sdb is not a mountable filesystem.
root ~ $ udisksctl mount -b /dev/sdb1
Mounted /dev/sdb1 at /media/root/Debian 9.2.1 amd64 1.
root ~ $ udisksctl mount -b /dev/sdb2
Mounted /dev/sdb2 at /media/root/Debian 9.2.1 amd64 11.
root ~ $ sudo mkfs.vfat -n 'Ubuntu' -I /dev/sdb
sdb sdb1 sdb2
root ~ $ sudo mkfs.vfat -n 'debian' -I /dev/sdb1
mkfs.fat 3.0.26 (2014-03-07)
mkfs.fat: warning - lowercase labels might not work properly with DOS or Windows
mkfs.vfat: /dev/sdb1 contains a mounted filesystem.
root ~ $ sudo mkfs.vfat -n 'Debian' -I /dev/sdb1
mkfs.fat 3.0.26 (2014-03-07)
mkfs.fat: warning - lowercase labels might not work properly with DOS or Windows
mkfs.vfat: /dev/sdb1 contains a mounted filesystem.
root ~ $ sudo mkfs.vfat -n 'Debian' -I /dev/sdb2
mkfs.fat 3.0.26 (2014-03-07)
mkfs.fat: warning - lowercase labels might not work properly with DOS or Windows
mkfs.vfat: /dev/sdb2 contains a mounted filesystem.