Re: dual boot installation with UEFI

[Jeff <pacavegano%tutamail.com@localhost>]

Sep 27, 2026, 09:39 by :

> Sep 26, 2026, 00:11 by ea1abz%gmail.com@localhost:
>
>>
>>
>> El 26/9/26 a las 3:06, Jeff escribió:
>>
>>> Hi, folks,
>>>
>>> I wish to install NetBSD into the unused space (or I can pre-format it, if that would help) on a drive which already has a UEFI partition and a partition on which Gentoo is installed, and I want to keep Gentoo intact. I cannot find any instructions or tutorials regarding installing on a disk that has another OS on it, and all of my attempts have failed when I get to the point of accepting the disk layout. It quickly fails with a complaint about not being able to access /dev/dk* (and I'm trying to install on nvme).
>>>
>>> Is there a tutorial or FAQ somewhere that I'm not finding, or does anyone have any tips for how I might proceed?
>>>
>>> Thanks much!
>>> Jeff
>>>
>>
>>
>> Hi Jeff,
>>
>> Just to save you some of the headache I had, once you finish the installation with the help of the NetBSD experts and overcome your problem, I'd like to share what I use in /etc/grub.d/40_custom in my Debian GRUB configuration to boot NetBSD:
>>
>> menuentry 'NetBSD-bootloader' {
>>  insmod part_gpt
>>  search --no-floppy --fs-uuid --set b8b1-17ed
>>  chainloader /efi/boot/bootx64.efi
>> }
>>
>> Regards,
>> Ramiro
>>
> Thank you, Ramiro.
>
> Sorry if this should be obvious, but what is the --set argument?  I'm wondering if I can use it as is, or if I need to customize it?
>
> Jeff
>
I tried setting it to the UUID of my EFI partition, but after running grub-mkconfig, no new entry appeared in my grub menu.

Jeff