-t. You can use
--traytoggleto open the drive, if it is closed or close it, if it is open.
If you specify the
--noop option, information on the device will be shown, but no
action is taken.
$ eject -n eject: device is `/dev/sr0'
You can use
eject --default to see the default name for the
$ eject --default eject: default device: `/dev/cdrom'
If you need to determine the maximum data transfer speed a CD/DVD drive will
support for CDs, you can use the command
eject -X or
-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 drive may not cor‐ rectly report the speed and therefore this option does not work with them.
This option may not work for all drives. E.g., when I ran the command on a HP desktop system, no information was provided. I.e., I saw the following:
$ eject -X $
You may also need to run the command from the root account. On another CentOS 7, system, I saw a "permission denied" error when I used the command until I issued it from the root account.
$ eject -X eject: cannot open /dev/sr0: Permission denied $ su - root Password: Last login: Fri Jul 15 22:06:22 EDT 2016 on pts/1 # eject -X 48 #
The number can be translated to a data transfer speed using the table below.
|20×||1,200–3,000||up to 24.576||up to 2.93||4,000 (CAV)|
|32×||1,920–4,800||up to 39.3216||up to 4.69||6,400 (CAV)|
|36×||2,160–5,400||up to 44.2368||up to 5.27||7,200 (CAV)|
|40×||2,400–6,000||up to 49.152||up to 5.86||8,000 (CAV)|
|48×||2,880–7,200||up to 58.9824||up to 7.03||9,600 (CAV)|
|52×||3,120–7,800||up to 63.8976||up to 7.62||10,400 (CAV)|
|56×||3,360–8,400||up to 68.8128||up to 8.20||11,200 (CAV)|
|72×||6,750–10,800||up to 88.4736||up to 10.5||2,000 (multi-beam)|