maybe ... rsync... rsync ... sync ... unmount?

John Westerdale 

Sr Container Consultant  RHCSA-8.2

Red Hat NYC Office/WFH 

john.westerdale@redhat.com   

M: 201-376-9993     IM: jwesterd   He / Him / His

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On Thu, Aug 26, 2021 at 9:01 AM Geoffrey Leach <geoff@hughes.net> wrote:
On Thu, 26 Aug 2021 19:20:06 +0930
Tim via users <users@lists.fedoraproject.org> 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
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