Bug#1141839: installation-reports: preseed overwrites installer USB stick if no other drives are detected

On Sun, 2026-07-19 at 21:38 +0200, Holger Wansing wrote:
> We (Pascal and me) already noticed, that the test with the ISO produced
> by Salsa CI is not 100% realistic.
> The underlying concept of that images means, that the installation image
> is not mounted to /cdrom.
> And that means, that Pascal's changes do not take effect.

Ah, that makes sense.  Thanks for the explanation and workaround!  I
gave it a try and can confirm that when the installer USB stick is
mounted at /cdrom, and there are no other disks, the "Partition disks"
step no longer has Guided or Manual options and no disks are shown.
If I attach a second USB stick, the Guided and Manual options reappear
and only the disk for the second USB stick is shown.  That seems
perfect to me.

Thanks again,
Kevin