Here Ubuntu Natty, same problem with LaCie Rikiki 1T usb 3.0
Error detaching: helper exited with exit code 1: Detaching device /dev/sdb
USB device: /sys/devices/pci0000:00/0000:00:1c.7/0000:45:00.0/usb3/3-2)
SYNCHRONIZE CACHE: FAILED: No such file or directory
(Continuing despite SYNCHRONIZE CACHE failure.)
STOP UNIT: FAILED: No such file or directory
Here Ubuntu Natty, same problem with LaCie Rikiki 1T usb 3.0
Error detaching: helper exited with exit code 1: Detaching device /dev/sdb pci0000: 00/0000: 00:1c.7/ 0000:45: 00.0/usb3/ 3-2)
USB device: /sys/devices/
SYNCHRONIZE CACHE: FAILED: No such file or directory
(Continuing despite SYNCHRONIZE CACHE failure.)
STOP UNIT: FAILED: No such file or directory