eject - eject removable media
allows removable media (typically a CD-ROM, floppy disk, tape, JAZ,
ZIP or USB 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 device
is ejected. If no
name is specified, the default name /dev/cdrom is used. The device may be
addressed by device name (e.g. 'sda'), device path (e.g. '/dev/sda'),
UUID=<uuid> or LABEL=<label> tags.
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.
If device partition is specified, the whole-disk device is used. If the device
or a device partition is currently mounted, it is unmounted before ejecting.
- -a, --auto on|off
- This option controls the auto-eject mode, supported by some devices. When
enabled, the drive automatically ejects when the device is closed.
- -c, --changerslot slot
- 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.
- -d, --default
- List the default device name.
- -f, --floppy
- This option specifies that the drive should be ejected using a removable
floppy disk eject command.
- -F, --force
- Force eject, don't check device type.
- -h, --help
- Print a help text and exit.
- -i, --manualeject on|off
- This option controls locking of the hardware eject button. When enabled,
the drive will not be ejected when the button is pressed. This is useful
when you are carrying a laptop in a bag or case and don't want it to eject
if the button is inadvertently pressed.
- -p, --proc
- This option allow you to use /proc/mounts instead /etc/mtab. It also
passes the -n option to umount(1).
- -q, --tape
- This option specifies that the drive should be ejected using a tape drive
- -m, --no-unmount
- The option tells eject to not try to unmount at all.
- -M, --no-partitions-unmount
- The option tells eject to not try to unmount another partitions on
partitioned devices. If another partition is mounted the program will not
attempt to eject the media. It will attempt to unmount only mountpoint or
mounted device given on eject command line.
- -n, --noop
- With this option the selected device is displayed but no action is
- -t, --trayclose
- With this option the drive is given a CD-ROM tray close command. Not all
devices support this command.
- -T, --traytoggle
- With this option the drive is given a CD-ROM tray close command if it's
opened, and a CD-ROM tray eject command if it's closed. Not all devices
support this command, because it uses the above CD-ROM tray close
- -r, --cdrom
- This option specifies that the drive should be ejected using a CDROM eject
- -s, --scsi
- This option specifies that the drive should be ejected using SCSI
- -v, --verbose
- Run in verbose mode; more information is displayed about what the command
- -V, --version
- Display program version and exit.
- -x, --cdspeed <speed>
- With this option the drive is given a CD-ROM select speed command. The
speed argument is a number indicating the desired speed (e.g. 8 for 8X
speed), or 0 for maximum data rate. Not all devices support this command
and you can only specify speeds that the drive is capable of. Every time
the media is changed this option is cleared. This option can be used
alone, or with the -t and -c options.
- -X, --listspeed
- With this option the CD-ROM drive will be probed to detect the available
speeds. The output is a list of speeds which can be used as an argument of
the -x option. This only works with Linux 2.6.13 or higher, on previous
versions solely the maximum speed will be reported. Also note that some
drive may not correctly report the speed and therefore this option does
not work with them.
Returns 0 if operation was successful, 1 if operation failed or command syntax
was not valid.
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.
does not work, it is most likely a limitation of the kernel
driver for the device and not the eject
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).
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.
determines that the device can have multiple partitions, it will
attempt to unmount all mounted partitions of the device before ejecting (see
--no-partitions-unmount). 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 is
required to eject some devices (e.g. SCSI devices).
The eject command is part of the util-linux package and is available from