8 0 156290904 sda 8 16 156290904 sdb 8 32 244198584 sdc
So, all 3 of these are SATA disks? You don't have the usb_storage module loaded... What kernel are you using (uname -a)? Is it a distro kernel, or did you build it? What do `cat /proc/bus/usb/devices` and 'modinfo usb_storage` say?
Alexey
