I am answering myself. It must be the opened UUID. Looks like this problem is solved.
Thank you all for the fast response! I hope, my question was not too annoying. But I am very very happy, to get this little issue so easily solved - and learned something, too. Thank you all, you made a man happy! Best regards Hans Am Sonntag, 27. August 2023, 21:12:30 CEST schrieb Hans: > So, now I added all UUIDs. But I am not quite sure for the enrcypted /home > partition. The UUID changes when the device is luks-opened. > > Which one must be in the fstab? The one from "lsblk -f /dev/sda4" or > "lsblk -f /dev/mapper/home"? > > Am Sonntag, 27. August 2023, 20:26:46 CEST schrieb Greg Wooledge: > > On Sun, Aug 27, 2023 at 08:19:35PM +0200, Hans wrote: > > > When I boot the system, then the drives are not mounted as set in > > > /etc/fstab. For example, the SDD should mounted to /space, and the > > > unencrypted HDD shall be mounted to /daten. > > > > > > But it seems, sometimes the mountpoints are not correct, so the SDD is > > > not > > > mounted to /space, but to /daten. > > > > This sounds like you used the dynamically assigned device names (e.g. > > /dev/sda1 and so on) in fstab. If that's what you did, stop doing that. > > > > Use UUIDs or Labels instead. These won't change, while the device names > > *will* change.