Re: premature umount

maybe ... rsync... rsync ... sync ... unmount? On Thu, Aug 26, 2021 at 9:01 AM Geoffrey Leach <geoff(a)hughes.net&gt; wrote: > On Thu, 26 Aug 2021 19:20:06 +0930 > Tim via users <users(a)lists.fedoraproject.org&gt; wrote: > > > On Wed, 2021-08-25 at 21:21 -0700, Geoffrey Leach wrote: > > > I have a script that mounts an MP3 device, copies files and > > > umounts. As I have counted on the umount to hang until the data > > > transfer is complete. That has worked fine until recently. Now > > > the umount finishes, leaving much of the data uncopied. > > > > Just to be very clear: > > > > Have you issued a string of commands, so that you expect all the > > copy commands to be executed in series before the unmount command > > is issued? Write-caching can be a problem, though the system > > shouldn't be unmounting before the cache is flushed. > > > > Or have you issued the copy and unmount commands, and hope that > > the actual copying will hold the unmounting at bay until finished? > > Parallel commands can be a problem, if you expect them to be > > issued in one order, but they don't quite get queued up in the > > way you expect. > > > > > > > > This sounds rather similar to the problem I've seen with with USB > > flashdrives, and SD cards, where I've seen the message pop up on > > the screen telling me it's okay to unplug the drive, but clearly > > the data transfers actually haven't yet finished. In my case, > > that would be some time after dragging and dropping files onto > > the destination, then waiting what seemed a reasonable amount of > > time before I right-clicked to eject or unmount the device > > copy ... copy ...umount maybe ... rsync... rsync ... sync ... unmount?