The system detects internal disks as external disks

[ogarcia]

It comes from here (GNOME GVFS) and here (Arch Linux forum).

Initially a Kernel update caused disks, which are not in the fstab, to appear automatically mounted. Seeing that this was triggered by upgrading the kernel from a 6.8 to a 6.9 version it was determined that the culprit change might be this commit. After recompiling the kernel by reverting that change it was found that this commit was indeed the culprit.

With udisksctl info --block-device /dev/sdb and the old kernel (before 6.9) HintAuto is set to false. But from kernel version 6.9 onwards (after the change) it appears set to true.

For now there is no open issue in the Kernel for this reason.