On Sun, Nov 06, 2011 at 02:35:57AM +0000, T o n g wrote: > > Did you recently change the partition table on that device? That will > > sometimes cause the kernel to be out of sync with the device. > > Bingo! > > I remember it was a "long" time ago that I changed the partition. But > apparently it is not long enough to beat my last reboot: > I found UUID makes life easier. -- Chen Wei