Just been googling for other reports on this and have found a workaround that is good for me: Remove the USB 2.0 support provided by ehci_hcd:
root@ubuntu:~# rmmod ehci_hcd
Then the copy works (but takes a long time, because USB is now 1.1).
Hope this helps others to track down the problem: I do not want to have to use USB 1.1 if I can help it.
Just been googling for other reports on this and have found a workaround that is good for me:
Remove the USB 2.0 support provided by ehci_hcd:
root@ubuntu:~# rmmod ehci_hcd
Then the copy works (but takes a long time, because USB is now 1.1).
Hope this helps others to track down the problem: I do not want to have to use USB 1.1 if I can help it.