1 2 3 4 5 6 7 | smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.16.0-30-generic] (local build) Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org /dev/sdc: Unknown USB bridge [0x0781:0x5581 (0x100)] Please specify device type with the -d option. Use smartctl -h to get a usage summary |