On Sunday, November 18, 2012 01:43:54 PM Andreas Rönnquist wrote: > > Try 'sync' after the write is supposedly complete; see what happens > > when the system actually tries to write to the device. Open a shell > > and 'tail -f /var/log/messages' to see if anything is griping about > > the device during writes. > > > > Hmmm. You *are* waiting for the cached data to be flushed to the > > drive before unplugging it, right? > > hmm, I now I have tried several different USB-sticks, and I still have > the problem (It perhaps isn't quite as serious as I believed though)... > > If having copied a "big" file, unmounting through Thunar pretty much > > always results in the following error message: > > Failed unmounting 'Devicename' > > "Did not receive a reply. Possible causes include: the remote > > application did not send a reply, the message bus security policy > > blocked the reply, the reply timeout expired, or the network > > connection was broken." > > - after a short while (way before the actual writing is done) - But, if > I keep waiting for some time _after_ this, the data is still written to > the device as it should. However, it doesn't give any clue whatsoever > to when it actually is finished writing the files to the device, so it > is easy to (by mistake) physically take the USB-stick before the data is > actually written. > > However, I do have one USB-stick, that actually lights up a LED during > copying, making it pretty easy to spot when it is safe to remove it and > not, but I kind of wish that that sort of feature wouldn't be necessary > to safely use an USB-stick... > > If I don't copy any files, or just copy small files, I get that > standard "It's now safe to remove the device" when unmounting - This > is what I expect in the scenario with bigger files described above > too after copying is done, but no...
The current version of teh command line umount does seem to wait until all data are flushed to the drive before exiting; older versions, IIRC, didn't necessarily wait. Hmmm. You said 'timeout'. Could it be that Thunar doesn't wait long enough? See if there's a way to increase that timeout. 10 seconds generally ought to be long enough, unless you have a *very* slow flash drive. Or, if there's a way to do it, tell Thunar to mount using "-o sync"; this should disable caching (that is, make the effective policy 'write-through'). Writes will be slower, but you won't have to wait for the flush to complete when unmounting. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/201211181419.48442.neal.p.mur...@alum.wpi.edu
