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
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