Not all devices support this command. With this option the selected device is displayed but no action is performed. This option specifies that the drive should be ejected using SCSI commands. This option specifies that the drive should be ejected using a removable floppy disk eject command. This option specifies that the drive should be ejected using a tape drive offline command.
All options have corresponding long names, as listed below.
The long names can be abbreviated as long as they are unique. If eject does not work, it is most likely a limitation of the kernel driver for the device and not the eject program itself. More than one method can be specified. If the device name is a symbolic link, eject will follow the link and use the device that it points to. If eject determines that the device can have multiple partitions, it will attempt to unmount all mounted partitions of the device before ejecting.