eject

EJECT(1)                         User Commands                        EJECT(1)

NAME
       eject - eject removable media

       eject [options] device|mountpoint

DESCRIPTION
       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.

OPTIONS
       -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.

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

NOTES
       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).

AUTHORS
       Jeff Tranter <tranter@pobox.com> - original author, Karel Zak
       <kzak@redhat.com> and Michal Luscon <mluscon@redhat.com> - util-linux
       version.

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

REPORTING BUGS
       For bug reports, use the issue tracker at
       https://github.com/karelzak/util-linux/issues.

AVAILABILITY
       The eject command is part of the util-linux package which can be
       downloaded from Linux Kernel Archive
       <https://www.kernel.org/pub/linux/utils/util-linux/>.

util-linux 2.37.2                 2021-06-02                          EJECT(1)