Date: Wed, 2 Jun 2021 10:43:09 -0700 From: "Thomas D. Dean" <tomdean@wavecable.com> To: freebsd-questions@freebsd.org Subject: Re: Grub Entry to Boot FreeBSD Message-ID: <f24f6c17-0b81-b341-6f5b-d7f7f44671c4@wavecable.com> In-Reply-To: <61cf5297-d289-9356-62b1-feb577050d6e@wavecable.com> References: <61cf5297-d289-9356-62b1-feb577050d6e@wavecable.com>
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On 6/1/21 9:10 PM, Thomas D. Dean wrote:
> I have a remote system with Linux and FreeBSD. I want to select the
> next boot OS at runtime and boot it.
>
> I can do that with
> grub-set-default 'Ubuntu'
> -or-
> grub-set-default 'FreeBSD'
> and reboot.
>
> My problem is with the FreeBSD entry. How do I write the entry?
>
> The disks are:
> NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
> nvme0n1 259:0 0 931.5G 0 disk
> |-nvme0n1p1 259:4 0 512M 0 part /boot/efi
> `-nvme0n1p2 259:5 0 931G 0 part /
> nvme1n1 259:1 0 931.5G 0 disk
> `-nvme1n1p1 259:3 0 931.5G 0 part
> nvme2n1 259:2 0 931.5G 0 disk
> |-nvme2n1p1 259:6 0 512K 0 part
> |-nvme2n1p2 259:7 0 928G 0 part
> `-nvme2n1p3 259:8 0 3.5G 0 part
>
> /dev/nvme0n1p2: UUID="55626001-0033-445b-bd2b-0bf4766e25bb" TYPE="ext4"
> PARTUUID="2b247e80-cf2e-4be1-b6d7-61152af7132f"
> /dev/nvme0n1p1: UUID="7076-258D" TYPE="vfat" PARTLABEL="EFI System
> Partition" PARTUUID="16a50609-64b2-47ad-8802-c3cbb4be263f"
> /dev/nvme1n1p1: UUID="e26e4bf7-6e65-4fac-b2b4-f84019f70c08" TYPE="ext4"
> PARTUUID="beccec5f-01"
> /dev/nvme2n1p1: PARTUUID="3fed2b68-c26f-11eb-a073-18c04d84849a"
> /dev/nvme2n1p2: UUID="60b57d7bd4b24f00" TYPE="ufs"
> PARTUUID="3fed7a4f-c26f-11eb-a073-18c04d84849a"
> /dev/nvme2n1p3: PARTUUID="3fedfa22-c26f-11eb-a073-18c04d84849a"
>
> Device Start End Sectors Size Type
> /dev/nvme2n1p1 40 1063 1024 512K FreeBSD boot
> /dev/nvme2n1p2 1064 1946157095 1946156032 928G FreeBSD UFS
> /dev/nvme2n1p3 1946157096 1953525127 7368032 3.5G FreeBSD swap
>
> Ubuntu is on nvme0n1, or, I think hd0,1 in grub terms.
> FreeBSD is on nvme2n1, or, I think hd2,2
>
> But, grub thinks hd2 is just hd2 or hd2,msdos1
>
> I have
> > cat /etc/grub.d/40_custom
> #!/bin/sh
> exec tail -n +3 $0
> # This file providesan easyway toadd custom menu entries.Simply type the
> # menu entries youwant toadd after this comment.Be careful not to change
> # the 'exec tail' line above.
> menuentry 'FreeBSD' {
> insmod ufs2
> set root=(hd2,2)
> chainloader /boot/loader.elf
> }
>
> I tried
> menuentry 'FreeBSD' {
> insmod ufs2
> set root=(hd2,1,a)
> search --no-floppy -fs-uuid --set 3fed2b68-c26f-11eb-a073-18c04d84849a
> kfreebsd /boot/loader
> }
>
> When I reboot after grub-set-default 'FreeBSD', the remote system hangs.
> Grub can not find hd2.
>
It seems impossible to boot FreeBSD with grub. In grub, I can find the
Freebsd /boot directory and load some files. But, it will not boot.
I used Freebsd from 0.1 386bsd to FreeBSD 11. Then switched to linux for
a major application. Now, I have a couple applications to run on
FreeBSD. It did not seem so hard earlier...
There are many 'different' examples that turn up when I google. But,
none of them seem to work.
I give up.
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