This step depends on the DVD player you’re using, but if you’re lucky you may just be able to press the Eject button on your keyboard. Because you unmounted the DVD, you have to do something to eject the DVD from the DVD drive. You can also try other options with the dd command, such as trying to control the block size, but I’ve found that the default command runs faster than any block size command arguments I’ve tried.

I’ve been backing up a few DVDs today using an external USB 2.0 DVD drive, and I’ve found that the process takes 30-60 minutes, depending on the size/contents of the DVD. Once you hit, the backup process will start. Because my identifier is disk2, I use this command to unmount my drive:

The next thing you need to do is to unmount the CD/DVD drive. That’s all you need to know for this step. This means that the device that the Mac/Unix system uses to communicate with the DVD drive is /dev/disk2.

In my case, the last entry is the entry for my DVD drive - which you can tell in a variety of ways, including the words external and DVD, as well as the size - and the identifier is disk2. 2: Apple_CoreStorage MacOS 499.4 GB disk0s2ģ: Apple_Boot Recovery HD 650.0 MB disk0s3

Create mac os usb from dvd