Hi David, the problem is the USB drive would flash during saving. Then it would stop flashing. Then it would flash again when sync-ing (i think) after a few seconds. How would the user know when to remove? Without doubting you, Is the speed really so significant between sync and async? You mentioned "You can indeed add your own mount options. Please search the archives." Is this the part where we add SYNC option to USB? Thanks Simon <div>On 10/17/05, David Zeuthen <<a href="mailto:david@fubar.dk">david@fubar.dk</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> On Mon, 2005-10-17 at 20:13 +0800, Saimun Cheng wrote: > Because mounting and unmounting should be transparent to them, I would > like to ensure that after Users saved their files, the files get > flushed immediately to thumbdrive. I think SYNC is the option for > that. Not with recent Linux kernels, it'll make reading/writing go much slower than without sync. This problem is just difficult to solve really - suggest to put up signs saying "don't remove drive while you are saving your documents and/or the LED is on". > I know /etc/fstab cannot be modified and it's to do > with /hal/fdi ...blah blah.. You can indeed add your own mount options. Please search the archives. Thanks, David </blockquote></div>