I have a laptop computer with 2 disks; a regular internal disk and a USB external disk. The internal disk is dual-boot between Windows 10 and opensuse leap 15.1; I use the USB disk for Debian.
This was fine with Debian 9, but when I installed Debian 10 on the USB disk, the Debian installer put its 'grub' on the internal disk (overwriting the opensuse grub). I was expecting Debian to put its 'grub' on the external disk alongside the rest of the Debian installation. On booting the system without the external disk, it didn't boot; I was dropped into the grub command line. I think the Debian 10 installer also changed the UUID of the swap partition on the internal disk. In the Debian install, I specified 'manual' disk partitioning based on existing partitions; and told the installer to use the / and /home partitions on the external disk that I had previously used for Debian 9. So I think there is a bug in the Debian 10 installer, in that it changed my internal disk when I had not asked for this. I was using the firmware-10.1.0-amd64-DVD-1.iso image from cdimage.debian.org . Is this a bug ? Can it be fixed ? -- Chris Ward
