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.