[/var/log/message の内容]
umass0: PQI Travel Flash, rev 1.10/2.05, addr 4
da0 at umass-sim0 bus 0 target 0 lun 0
da0: <General Flash Disk Drive 2.05> Removable Direct Access SCSI-2 device 
da0: 650KB/s transfers
da0: 30MB (62720 512 byte sectors: 64H 32S/T 30C)
(da0:umass-sim0:0:0:0): READ(6)/WRITE(6) failed, minimum_cmd_size is increased to 10.

[usbdevs -v の内容]
Controller /dev/usb0:
addr 1: self powered, config 1, UHCI root hub(0x0000), Intel(0x0000), rev 0x0100
 port 1 powered
 port 2 addr 2: self powered, config 1, TUSB2046 hub(0x2046), Texas Instruments(0x0451), rev 0x0125
  port 4 addr 4: power 100 mA, config 1, Travel Flash(0x0001), PQI(0x3538), rev 0x0205