diskutil
Utility to manage local disks and volumes. tldr-pages
On macOS
macOS
Utility to manage local disks and volumes. Some subcommands such as partitiondisk have their own usage documentation.
List all currently available disks, partitions, and mounted volumes
diskutil listIdentifyRepair the filesystem data structures of a volume
diskutil repairVolume /dev/diskIdentifyUnmount a volume
diskutil unmountDisk /dev/diskIdentifyEject a CD/DVD (unmount first)
diskutil eject /dev/diskXIdentify