Mounting and Unmounting Various Media Formats
In FreeBSD, working with a disk isn't a simple matter of putting it into the slot, as it is in desktop operating systems like Windows or the Mac OS, which know how to auto-mount volumes either when you insert them or when you try to access them. After you insert or install a disk, you then have to manually mount it in order for the system to be able to access it. When you're done using a removable disk, you have to unmount it before you can safely eject it.
Each type of disk or other media that you might want to add to your system has to be referred to by its device name—a short and often cryptic label that refers to the device in /dev that enables the kernel to talk to that piece of equipment.
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