IOReg Info displays the output of the IORegistryKit, which describes all items connected to the computer (e.g., SATA Drives, USB Drives, FireWire Drives, software RAID sets). This tool can be used to locate partition information, including sizes, types, and the bus to which the device is connected. Additionally, it's able to display any one of 22 different media class types, as well as all the information available via IOReg.
