Re: Booting Debian 10 installer ISO from USB
Le 23/11/2019 à 20:13, Brian a écrit :
On Sat 23 Nov 2019 at 11:00:58 -0600, prueba@finsakxim.com.mx wrote:
This
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=841135
would explain why it works for you, as well as in other cases.
It seems to only work at maximum level 1 directories;
I already told you exactly this in my previous post :
"The quick scan only searches in top-level directories."
Thank you for the link. I had not seen this report before. One bit of it
is the statement:
> From what I understand now, iso-scan is not meant to use
> any iso filename supplied to it via grub command line, but
> it rather prefers to scan the USB stick for usable images
This is what I understood from a quick look at the script.
> itself, and then present the user with a menu.
Only with lower priority. With default priority, it automatically
selects the first "usable" image found.
My understanding is that iso-scan/filename= simply says which ISO is to
be searched for.
How did you understand this ? It matches neither the script nor the
experiences.
I put two Debian ISOs in /boot/iso and had a similar grub.cfg to yours:
iso_path=/boot/iso/debian-10.2.0-amd64-xfce-CD-1.iso
export iso_path
search --set=root --file "$iso_path"
loopback loop "$iso_path"
menuentry "Test" {
linux /boot/vmlinuz iso-scan/filename=$iso_path priority=low
initrd /boot/initrd.gz
}
I get a list of sixteen partitions and devices and choose the one that I
know holds the ISOs (/dev/sdg1).
This is the effect of priority=low.
This comes up with (as it did for you):
> The quick scan for installer ISO images, which looks only
> in common places....
But a full disk search immediately scans /dev/sdg1 and presents a choice
between the two ISOs.
Again the effect of priority=low.
So iso-scan seems to ignore the iso-scan/filename value provided in the
command line. If I understood the script correctly, it does not read
this parameter, it only writes the selected image pathname into it.
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