Re: question to file copy to external media

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On Wed, 2017-07-26 at 11:50 -0700, Samuel Sieb wrote:
> On 07/26/2017 02:13 AM, Joerg Lechner wrote:
> > I frequently copy files (Size about 2GB, sometimes 50 files of this size 
> > in one copying process) from my internal laptop disk (Win8.1) to an 
> > external media, usb flash drive or external disk. The copying progress 
> > is schown in the right upper corner of the display. When the display 
> > shows "copying is finished", the copying process is not really finished, 
> > it takes some additional minutes, before I can eject the external media. 
> > This appears in F24/F25/F26. This is confusing.
> 
> This is standard behaviour on all current operating systems.  That is 
> why they all have the "eject" button for unmounting external media.  The 
> reason is that the operating system buffers the data in memory and then 
> writes it to the device as fast as the device can accept it.  This lets 
> whatever process is doing the writing to get on with other things 
> instead of having to wait for slow media.  The unmount command waits for 
> all the cached data to be written to the device before unmounting.  Then 
> you get a notification saying that you can remove it.

I don't think it's "standard behaviour", no. I think quite a lot of
file managers only copy synchronously, to avoid exactly this confusion.
It would help if Joerg specified which desktop / file manager he's
using?
-- 
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | XMPP: adamw AT happyassassin . net
http://www.happyassassin.net
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