On Tue, Apr 20, 2021 at 07:28:19AM -0400, Greg Wooledge wrote:
> On Tue, Apr 20, 2021 at 12:39:13PM +0200, to...@tuxteam.de wrote:
> > On Tue, Apr 20, 2021 at 12:00:05PM +0200, Rainer Dorsch wrote:
> > > For me the crucial message is
> > > 
> > > basic-save-buffer-2: Unlocking file: Operation not permitted, 
> > > /mnt/dor1rt/Local/
> > > Managed/sb.blog
> > 
> > Anyway, this is a good hint. See
> > 
> >   "18.3.4 Protection against Simultaneous Editing"
> > 
> > in the Emacs user manual (or, if you prefer reading in a browser,
> > here [1].
> > 
> > But your permissions set up is... strange. The above behaviour
> > doesn't look plausible to me. Unless rd is actually root.
> 
> Or /mnt/dor1rt/Local/ is on a non-Unix file system.  Perhaps it's a
> removable USB device with an NTFS or FAT type file system.  Or perhaps
> it's some sort of network file system whose underlying implementation
> is not Unix-based.

Yes, non-Unix file system os definitely a reasonable option: the
/mnt/ part (and the 777 modes everywhere) could be seen as a
hint :-)

Cheers
 - t

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