SUMMARY I changed the root partition on a virtualbox recently with the KDE partition manager. However the displayed available space for example in Dolphin did not change. Not sure what causes this, either the resize did not work properly or the way how the available space is calculated does not work in this circumstance. It updates, but the values are updated in a way as if the disk size was still 8 GB, not 16 GB.
Created attachment 133708 [details] Screenshot showing the properties window of the drive While the drive is displayed as 16 GB at other instances, the properties window still shows 8GB.
Created attachment 133709 [details] Result after updating the size information After pressing the button to update the size information, it displays 128TiB there now, which is also wrong and probably related.
After further expanding the disk space using gparted this time, everything seems to work as expected again. I still don't know what caused the problem here.
Well, not everything. The 128 TiB problem is still there; created https://bugs.kde.org/show_bug.cgi?id=429781 for that now.