1 2 3 4 5 6 7 8 | arijit@Hum:~$ sudo smartctl --all /dev/sdb smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.13.0-53-generic] (local build) Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org /dev/sdb: Unknown USB bridge [0x1058:0x0820 (0x1012)] Please specify device type with the -d option. Use smartctl -h to get a usage summary |