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EJECT(1)                         User Commands                        EJECT(1)

       eject - eject removable media

       eject -h
       eject [-vnrsfmqp] [<name>]
       eject [-vn] -d
       eject [-vn] -a on|off|1|0 [<name>]
       eject [-vn] -c slot [<name>]
       eject [-vn] -i on|off|1|0 [<name>]
       eject [-vn] -t [<name>]
       eject [-vn] -T [<name>]
       eject [-vn] -x <speed> [<name>]
       eject [-vn] -X [<name>]
       eject -V

       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  sup-
       ported by some devices, and close the disc tray of some CD-ROM drives.

       The device corresponding to <name> is ejected. The name can be a device file or mount point, either a full path
       or with the leading "/dev", "/media" or "/mnt" omitted. If no name is specified, the default  name  "cdrom"  is

       There  are four different methods of ejecting, depending on whether the device is a CD-ROM, SCSI device, remov-
       able floppy, or tape. By default eject tries all four methods in order until it succeeds.

       If the device is currently mounted, it is unmounted before ejecting.

       -h   This option causes eject to display a brief description of the command options.

       -v   This makes eject run in verbose mode; more information is displayed about what the command is doing.

       -d   If invoked with this option, eject lists the default device name.

       -a on|1|off|0
            This option controls the auto-eject mode, supported by some devices.  When enabled,  the  drive  automati-
            cally ejects when the device is closed.

       -c <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

       -i on|1|off|0
            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.

       -t   With this option the drive is given a CD-ROM tray close command. Not all devices support this command.

       -T   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

       -x <speed>
            With this option the drive is given a CD-ROM select speed command.  The speed argument is a  number  indi-
            cating  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   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.

       -n   With this option the selected device is displayed but no action is performed.

       -r   This option specifies that the drive should be ejected using a CDROM eject command.

       -s   This option specifies that the drive should be ejected using SCSI commands.

       -f   This option specifies that the drive should be ejected using a removable floppy disk eject command.

       -q   This option specifies that the drive should be ejected using a tape drive offline command.

       -p   This option allow you to use /proc/mounts instead /etc/mtab. It also passes the -n option to umount(1).

       -m   This option allows eject to work with device drivers which automatically mount removable media and  there-
            fore must be always mount(1)ed.  The option tells eject to not try to unmount the given device, even if it
            is mounted according to /etc/mtab or /proc/mounts.

       -V   This option causes eject to display the program version and exit.

       All options have corresponding long names, as listed below. The long names can be abbreviated as long  as  they
       are unique.

       -h --help
       -v --verbose
       -d --default
       -a --auto
       -c --changerslot
       -t --trayclose
       -T --traytoggle
       -x --cdspeed
       -X --listspeed
       -n --noop
       -r --cdrom
       -s --scsi
       -f --floppy
       -q --tape
       -V --version
       -p --proc
       -m --no-unmount

       Eject the default device:


       Eject a device or mount point named cdrom:

              eject cdrom

       Eject using device name:

              eject /dev/cdrom

       Eject using mount point:

              eject /mnt/cdrom/

       Eject 4th IDE device:

              eject hdd

       Eject first SCSI device:

              eject sda

       Eject using SCSI partition name (e.g. a ZIP drive):

              eject sda4

       Select 5th disc on multi-disc changer:

              eject -v -c4 /dev/cdrom

       Turn on auto-eject on a SoundBlaster CD-ROM drive:

              eject -a on /dev/sbpcd

       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 parti-
       tions 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/',
       '/media/' ,'/mnt/', '/dev/cdroms', '/dev/rdsk/', '/dev/dsk/', and finally './' to the name, until a device file
       or mount point is found that can be opened. The program checks /etc/mtab for mounted devices. If that fails, it
       also checks /etc/fstab for mount points of currently unmounted devices.

       Creating symbolic links such as /dev/cdrom or /dev/zip is recommended so that eject can determine the appropri-
       ate devices using easily remembered names.

       To save typing you can create a shell alias for the eject options that work for your particular setup.

       Eject was written by Jeff Tranter ( and is released under the conditions of the  GNU  General
       Public License. See the file COPYING and notes in the source code for details.

       The  -x option was added by Nobuyuki Tsuchimura (, with thanks to Roland Krivanek (kri- and his cdrom_speed command.

       The -T option was added by Sybren Stuvel (, with big thanks  to  Benjamin  Schwenk  (ben-

       The -X option was added by Eric Piel (

       mount(2), umount(2), mount(8), umount(8)

Linux                             12 May 2005                         EJECT(1)