Grub menu entry for a system on a second drive.

[peter@easthope.ca]

Hi, 

root@imager:~# grep PROBER /etc/default/grub
GRUB_DISABLE_OS_PROBER=true

Also,

root@imager:~# cat /etc/grub.d/40*
#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
#
menuentry "Void linux"{
        insmod part_gpt
        insmod ext2
        set root=(hd1,gpt6) reboot=bios
        linux /boot/vmlinuz-6.6.56_2 root=UUID=e5c7eb47-8d4c-49da-9038-09c27e8e8
990 ro single
        echo    'Loading ramdisk.'
        initrd  /boot/initramfs-6.6.56_2.img
}

Then,

root@imager:~# update-grub
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-5.10.0-24-amd64
Found initrd image: /boot/initrd.img-5.10.0-24-amd64
Warning: os-prober will not be executed to detect other bootable partitions.
Systems on them will not be added to the GRUB boot configuration.
Check GRUB_DISABLE_OS_PROBER documentation entry.
done

/boot/grub/grub.cfg has the menu entry.

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
#
menuentry "Void linux"{
        insmod part_gpt
        insmod ext2
        set root=(hd1,gpt6) reboot=bios
        linux /boot/vmlinuz-6.6.56_2 root=UUID=e5c7eb47-8d4c-49da-9038-09c27e8e8
990 ro single
        echo    'Loading ramdisk.'
        initrd  /boot/initramfs-6.6.56_2.img
}
### END /etc/grub.d/40_custom ###

So far, good, but when booting the Void entry is absent.
https://easthope.ca/GrubMenu.jpg

Ideas?

Thanks,         ... P.

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VoIP:   +1 604 670 0140
work: https://en.wikibooks.org/wiki/User:PeterEasthope