M
diskutil eraseVolume jhfs+ "Macintosh HD" disk2
-bash-3.2# diskutil eraseVolume jhfs+ "Macintosh HD" disk2
Started erase on disk2 Macintosh HD
Unmounting disk
Erasing
Initialized /dev/rdisk2 as a 465 GB case-insensitive HFS Plus volume with a 40960k journal
Mounting disk
Finished erase on disk2 Macintosh HD
-bash-3.2#
diskutil list