Date: Thu, 3 Jun 2021 08:10:43 -0700 From: "Thomas D. Dean" <tomdean@wavecable.com> To: freebsd-questions@freebsd.org Subject: Re: Grub Entry to Boot FreeBSD Message-ID: <c55db16d-0ba6-bb04-b520-c739f8ff3993@wavecable.com> In-Reply-To: <d35ce2e3-2c89-2aff-bcbe-a5ba36593f4c@gmx.at> References: <61cf5297-d289-9356-62b1-feb577050d6e@wavecable.com> <d35ce2e3-2c89-2aff-bcbe-a5ba36593f4c@gmx.at>
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On 6/3/21 4:10 AM, infoomatic wrote:
> May I suggest using UEFI? With UEFI you can install refind, and in the
> EFI partition there is a refind.conf where you can edit the default boot
> option. Its really simple to setup and work with, the only small issue
> is with an update on the Linux side it changes the efi boot order, but
> with efibootmgr you can change it back...
I am willing to use grub, since it is already installed. I do not want
additional, unknown code.
>
>
> On 02.06.21 06:10, 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.
>>
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