USB Storage device not working.

[Naoki]

I plug it in and get this :

usbaudio: dma timed out??
loop: loaded (max 8 devices)
usb 2-1: new full speed USB device using address 2
Initializing USB Mass Storage driver...
scsi2 : SCSI emulation for USB Mass Storage devices
  Vendor: Generic   Model: Generic       CF  Rev: 2.5D
  Type:   Direct-Access                      ANSI SCSI revision: 02
Attached scsi removable disk sda at scsi2, channel 0, id 0, lun 0
Attached scsi generic sg0 at scsi2, channel 0, id 0, lun 0,  type 0
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 2
drivers/usb/core/usb.c: registered new driver usb-storage
USB Mass Storage support registered.
updfstab: numerical sysctl 1 23 is obsolete.


I can't mount /dev/sda* ( no media found ).

[naoki at host naoki]$ sudo mount /dev/sda1 /mnt/flash/
mount: No medium found

Any ideas?