== connect ==
umass0: Sony USB Storage Media, rev 1.10/2.00, addr 6
umass0: Get Max Lun not supported (SHORT_XFER)
== disconnect ==
umass0: at uhub1 port 1 (addr 6) disconnected
(da0:umass-sim0:0:0:0): lost device
(da0:umass-sim0:0:0:0): removing device entry
umass0: detached

% usbdevs -v
Controller /dev/usb0:
addr 1: self powered, config 1, UHCI root hub(0x0000), VIA(0x0000), rev 1.00
port 1 addr 2: power 100 mA, config 1, TUSB2046 hub(0x2046), Texas Instruments(0x0451), rev 1.25
port 1 addr 6: power 94 mA, config 1, USB Storage Media(0x0010), Sony(0x08ec), rev 2.00

4: da0が割り当てられていないらしい