lsusb - disktest
Bus 002 Device 005: ID 0409:0058 NEC Corp. HighSpeed Hub
Bus 002 Device 004: ID 046d:c513 Logitech, Inc. MX3000 Cordless Desktop Receiver
Bus 002 Device 003: ID 04c1:009d U.S. Robotics (3Com) HomeConnect Webcam [vicam]
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub