eject(1) — Linux manual page


EJECT(1)                        User Commands                       EJECT(1)

NAME         top

       eject - eject removable media

SYNOPSIS         top

       eject [options] device|mountpoint

DESCRIPTION         top

       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

OPTIONS         top

       -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

       -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.

EXIT STATUS         top

       Returns 0 if operation was successful, 1 if operation failed or
       command syntax was not valid.

NOTES         top

       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

       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).

AUTHORS         top

       Jeff Tranter ⟨tranter@pobox.com⟩ - original author.
       Karel Zak ⟨kzak@redhat.com⟩ and Michal Luscon ⟨mluscon@redhat.com⟩ -
       util-linux version.

SEE ALSO         top

       findmnt(8), lsblk(8), mount(8), umount(8)

AVAILABILITY         top

       The eject command is part of the util-linux package and is available
       from Linux Kernel Archive 

COLOPHON         top

       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
       2020-09-18.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-09-15.)  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

Linux                            April 2012                         EJECT(1)