knubbze@wombatlair:/dev/bus/usb/001$ lsusb
Bus 005 Device 002: ID 0c45:62c0 Microdia 
Bus 005 Device 001: ID 0000:0000  
Bus 002 Device 001: ID 0000:0000  
Bus 003 Device 002: ID 03f0:171d Hewlett-Packard 
Bus 003 Device 001: ID 0000:0000  
Bus 001 Device 004: ID 0499:1037 Yamaha Corp. 
Bus 001 Device 001: ID 0000:0000  
Bus 004 Device 001: ID 0000:0000 

knubbze@wombatlair:/dev/bus/usb/001$ dmesg | tail
[25193.488000] usbcore: registered new interface driver libusual
[25193.496000] Initializing USB Mass Storage driver...
[25193.496000] usbcore: registered new interface driver usb-storage
[25193.496000] USB Mass Storage support registered.
[25301.728000] usb 1-2: USB disconnect, address 2
[25306.856000] usb 1-2: new full speed USB device using uhci_hcd and address 3
[25307.032000] usb 1-2: configuration #1 chosen from 1 choice
[25701.548000] usb 1-2: USB disconnect, address 3
[25704.952000] usb 1-2: new full speed USB device using uhci_hcd and address 4
[25705.128000] usb 1-2: configuration #1 chosen from 1 choice

knubbze@wombatlair:/dev/bus/usb/001$ cat /proc/partitions 
major minor  #blocks  name

   8     0  156290904 sda
   8     1  150392466 sda1
   8     2    5895855 sda2