1EJECT(1) User Commands EJECT(1)
2
6 eject - eject removable media
7 eject [options] device|mountpoint
9
11 eject allows removable media (typically a CD-ROM, floppy disk, tape,
12 JAZ, ZIP or USB disk) to be ejected under software control. The command
13 can also control some multi-disc CD-ROM changers, the auto-eject
14 feature supported by some devices, and close the disc tray of some
15 CD-ROM drives.
16 The device corresponding to device or mountpoint is ejected. If no name
18 is specified, the default name /dev/cdrom is used. The device may be
19 addressed by device name (e.g., 'sda'), device path (e.g., '/dev/sda'),
20 UUID=uuid or LABEL=label tags.
21 There are four different methods of ejecting, depending on whether the
23 device is a CD-ROM, SCSI device, removable floppy, or tape. By default
24 eject tries all four methods in order until it succeeds.
25 If a device partition is specified, the whole-disk device is used.
27 If the device or a device partition is currently mounted, it is
29 unmounted before ejecting. The eject is processed on exclusive open
30 block device file descriptor if --no-unmount or --force are not
31 specified.
32
34 -a, --auto on|off
35 This option controls the auto-eject mode, supported by some
36 devices. When enabled, the drive automatically ejects when the
37 device is closed.
38 -c, --changerslot slot
40 With this option a CD slot can be selected from an ATAPI/IDE CD-ROM
41 changer. The CD-ROM drive cannot be in use (mounted data CD or
42 playing a music CD) for a change request to work. Please also note
43 that the first slot of the changer is referred to as 0, not 1.
44 -d, --default
46 List the default device name.
47 -F, --force
49 Force eject, don’t check device type, don’t open device with
50 exclusive lock. The successful result may be false positive on non
51 hot-pluggable devices.
52 -f, --floppy
54 This option specifies that the drive should be ejected using a
55 removable floppy disk eject command.
56 -i, --manualeject on|off
58 This option controls locking of the hardware eject button. When
59 enabled, the drive will not be ejected when the button is pressed.
60 This is useful when you are carrying a laptop in a bag or case and
61 don’t want it to eject if the button is inadvertently pressed.
62 -M, --no-partitions-unmount
64 The option tells eject to not try to unmount other partitions on
65 partitioned devices. If another partition is still mounted, the
66 program will not attempt to eject the media. It will attempt to
67 unmount only the device or mountpoint given on the command line.
68 -m, --no-unmount
70 The option tells eject to not try to unmount at all. If this option
71 is not specified then eject opens the device with O_EXCL flag to be
72 sure that the device is not used (since v2.35).
73 -n, --noop
75 With this option the selected device is displayed but no action is
76 performed.
77 -p, --proc
79 This option allows you to use /proc/mounts instead /etc/mtab. It
80 also passes the -n option to umount(8).
81 -q, --tape
83 This option specifies that the drive should be ejected using a tape
84 drive offline command.
85 -r, --cdrom
87 This option specifies that the drive should be ejected using a
88 CDROM eject command.
89 -s, --scsi
91 This option specifies that the drive should be ejected using SCSI
92 commands.
93 -T, --traytoggle
95 With this option the drive is given a CD-ROM tray close command if
96 it’s opened, and a CD-ROM tray eject command if it’s closed. Not
97 all devices support this command, because it uses the above CD-ROM
98 tray close command.
99 -t, --trayclose
101 With this option the drive is given a CD-ROM tray close command.
102 Not all devices support this command.
103 -h, --help
105 Display help text and exit.
106 -V, --version
108 Print version and exit.
109 -v, --verbose
111 Run in verbose mode; more information is displayed about what the
112 command is doing.
113 -X, --listspeed
115 With this option the CD-ROM drive will be probed to detect the
116 available speeds. The output is a list of speeds which can be used
117 as an argument of the -x option. This only works with Linux 2.6.13
118 or higher, on previous versions solely the maximum speed will be
119 reported. Also note that some drives may not correctly report the
120 speed and therefore this option does not work with them.
121 -x, --cdspeed speed
123 With this option the drive is given a CD-ROM select speed command.
124 The speed argument is a number indicating the desired speed (e.g.,
125 8 for 8X speed), or 0 for maximum data rate. Not all devices
126 support this command and you can only specify speeds that the drive
127 is capable of. Every time the media is changed this option is
128 cleared. This option can be used alone, or with the -t and -c
129 options.
130
132 Returns 0 if operation was successful, 1 if operation failed or command
133 syntax was not valid.
134
136 eject only works with devices that support one or more of the four
137 methods of ejecting. This includes most CD-ROM drives (IDE, SCSI, and
138 proprietary), some SCSI tape drives, JAZ drives, ZIP drives (parallel
139 port, SCSI, and IDE versions), and LS120 removable floppies. Users have
140 also reported success with floppy drives on Sun SPARC and Apple
141 Macintosh systems. If eject does not work, it is most likely a
142 limitation of the kernel driver for the device and not the eject
143 program itself.
144 The -r, -s, -f, and -q options allow controlling which methods are used
146 to eject. More than one method can be specified. If none of these
147 options are specified, it tries all four (this works fine in most
148 cases).
149 eject may not always be able to determine if the device is mounted
151 (e.g., if it has several names). If the device name is a symbolic link,
152 eject will follow the link and use the device that it points to.
153 If eject determines that the device can have multiple partitions, it
155 will attempt to unmount all mounted partitions of the device before
156 ejecting (see also --no-partitions-unmount). If an unmount fails, the
157 program will not attempt to eject the media.
158 You can eject an audio CD. Some CD-ROM drives will refuse to open the
160 tray if the drive is empty. Some devices do not support the tray close
161 command.
162 If the auto-eject feature is enabled, then the drive will always be
164 ejected after running this command. Not all Linux kernel CD-ROM drivers
165 support the auto-eject mode. There is no way to find out the state of
166 the auto-eject mode.
167 You need appropriate privileges to access the device files. Running as
169 root is required to eject some devices (e.g., SCSI devices).
170
172 Jeff Tranter <tranter@pobox.com> - original author, Karel Zak
173 <kzak@redhat.com> and Michal Luscon <mluscon@redhat.com> - util-linux
174 version.
175
177 findmnt(8), lsblk(8), mount(8), umount(8)
178
180 For bug reports, use the issue tracker at
181 https://github.com/util-linux/util-linux/issues.
182
184 The eject command is part of the util-linux package which can be
185 downloaded from Linux Kernel Archive
186 <https://www.kernel.org/pub/linux/utils/util-linux/>.
187util-linux 2.38.1 2022-05-11 EJECT(1)