Eject allows removable media (typically a CD-ROM, floppy disk, tape, or JAZ or ZIP disk) to be ejected under software control. The command can also control some multi-disc CD-ROM changers, the auto-eject feature supported by some devices, and close the disc tray of some CD-ROM drives.
The device corresponding to
There are four different methods of ejecting, depending on whether the device is a CD-ROM, SCSI device, removable floppy, or tape. By default eject tries all four methods in order until it succeeds.
This option causes eject to display a brief description of the command options.
This makes eject run in verbose mode; more information is displayed about what the command is doing.
If invoked with this option, eject lists the default device name.
This option controls the auto-eject mode, supported by some devices. When enabled, the drive automatically ejects when the device is closed.
With this option a CD slot can be selected from an ATAPI/IDE CD-ROM changer. Linux 2.0 or higher is required to use this feature. The CD-ROM drive can not be in use (mounted data CD or playing a music CD) for a change request to work. Please also note that the first slot of the changer is referred to as 0, not 1.
With this option the drive is given a CD-ROM tray close command. 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 a CDROM eject command.
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.
All options have corresponding long names, as listed below. The long names can be abbreviated as long as they are unique.
Eject the default device:
Eject a device or mount point named cdrom:
Eject using device name:
Eject using mount point:
Eject 4th IDE device:
Eject first SCSI device:
Eject using SCSI partition name (e.g. a ZIP drive):
Select 5th disc on mult-disc changer:
eject -v -c5 /dev/cdrom
Turn on auto-eject on a !SoundBlaster? CD-ROM drive:
Eject only works with devices that support one or more of the four methods of ejecting. This includes most CD-ROM drives (IDE, SCSI, and proprietary), some SCSI tape drives, JAZ drives, ZIP drives (parallel port, SCSI, and IDE versions), and LS120 removable floppies. Users have also reported success with floppy drives on Sun SPARC and Apple Macintosh systems. If eject does not work, it is most likely a limitation of the kernel driver for the device and not the eject program itself.
The -r, -s, -f, and -q options allow controlling which methods are used to eject. More than one method can be specified. If none of these options are specified, it tries all four (this works fine in most cases).
Eject may not always be able to determine if the device is mounted (e.g. if it has several names). 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. If an unmount fails, the program will not attempt to eject the media.
You can eject an audio CD. Some CD-ROM drives will refuse to open the tray if the drive is empty. Some devices do not support the tray close command.
If the auto-eject feature is enabled, then the drive will always be ejected after running this command. Not all Linux kernel CD-ROM drivers support the auto-eject mode. There is no way to find out the state of the auto-eject mode.
You need appropriate privileges to access the device files. Running as root or setuid root is required to eject some devices (e.g. SCSI devices).
The heuristic used to find a device, given a name, is as follows. If the name ends in a trailing slash, it is removed (this is to support filenames generated using shell file name completion). If the name starts with '.' or '/', it tries to open it as a device file or mount point. If that fails, it tries prepending '/dev/', '/mnt/',
Creating symbolic links such as /dev/cdrom or /dev/zip is recommended so that eject can determine the appropriate devices using easily remembered names.