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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXIT STATUS | NOTES | AUTHORS | SEE ALSO | AVAILABILITY | COLOPHON |
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EJECT(1) User Commands EJECT(1)
eject - eject removable media
eject [options] device|mountpoint
eject 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 or mountpoint 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 a 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. The eject is processed on exclusive
open block device file descriptor if --no-unmount or --force are
not specified.
-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. The CD-ROM drive cannot 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, --force
Force eject, don't check device type, don't open device
with exclusive lock. The successful result may be false
positive on non hot-pluggable devices.
-f, --floppy
This option specifies that the drive should be ejected
using a removable floppy disk eject command.
-h, --help
Display 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.
-M, --no-partitions-unmount
The option tells eject to not try to unmount other
partitions on partitioned devices. If another partition
is still mounted, the program will not attempt to eject
the media. It will attempt to unmount only the device or
mountpoint given on the command line.
-m, --no-unmount
The option tells eject to not try to unmount at all. If
this option is not specified than eject opens the device
with O_EXCL flag to be sure that the device is not used
(since v2.35).
-n, --noop
With this option the selected device is displayed but no
action is performed.
-p, --proc
This option allows you to use /proc/mounts instead
/etc/mtab. It also passes the -n option to umount(8).
-q, --tape
This option specifies that the drive should be ejected
using a tape drive offline command.
-r, --cdrom
This option specifies that the drive should be ejected
using a CDROM eject command.
-s, --scsi
This option specifies that the drive should be ejected
using SCSI commands.
-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 command.
-t, --trayclose
With this option the drive is given a CD-ROM tray close
command. Not all devices support this command.
-V, --version
Display version information and exit.
-v, --verbose
Run in verbose mode; more information is displayed about
what the command is doing.
-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 drives may not correctly report the speed
and therefore this option does not work with them.
-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.
Returns 0 if operation was successful, 1 if operation failed or
command syntax was not valid.
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 (see also --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).
Jeff Tranter ⟨tranter@pobox.com⟩ - original author.
Karel Zak ⟨kzak@redhat.com⟩ and Michal Luscon ⟨mluscon@
redhat.com⟩ - util-linux version.
findmnt(8), lsblk(8), mount(8), umount(8)
The eject command is part of the util-linux package and is
available from Linux Kernel Archive
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩.
This page is part of the util-linux (a random collection of Linux
utilities) project. Information about the project can be found
at ⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you
have a bug report for this manual page, send it to
util-linux@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
2020-12-18. (At that time, the date of the most recent commit
that was found in the repository was 2020-12-17.) If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to man-pages@man7.org
Linux April 2012 EJECT(1)
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