diskutil

Utility to manage local disks and volumes. Some subcommands such as partitiondisk have their own usage documentation. More information: https://keith.github.io/xcode-man-pages/diskutil.8.html.

• List all currently available disks, partitions and mounted volumes:

diskutil list

• Repair the filesystem data structures of a volume:

diskutil repairVolume /dev/disk_device

• Unmount a volume:

diskutil unmountDisk /dev/disk_device

• Eject a CD/DVD (unmount first):

diskutil eject /dev/disk_device1