From: Adam Carter <adamcarter3@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Re: Using UUID for root disk in grub requires initramfs?
Date: Sat, 20 Jul 2019 09:19:54 +1000 [thread overview]
Message-ID: <CAC=wYCHVBfv6mHjAP2mAu40mY-WNDjkqLK7PPMjf9qcTLKoMPg@mail.gmail.com> (raw)
In-Reply-To: <20190719163716.l6lkpnwlrcxg3353@matica.foolinux.mooo.com>
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On Sat, Jul 20, 2019 at 2:37 AM Ian Zimmerman <itz@very.loosely.org> wrote:
> On 2019-07-19 20:58, Adam Carter wrote:
>
> > I experimented found the following worked in /etc/default/grub;
> >
> > GRUB_DEVICE="PARTUUID=d3554d49-02"
> >
> > Which writes grub.cfg as;
> > linux /vmlinuz-5.2.0-gentoo root=PARTUUID=d3554d49-02 ro
> > init=/usr/lib/systemd/systemd iommu=pt raid=noautodetect
> >
> > PARTUUID looked up with blkid. No initramfs required :)
>
> I don't get this. blkid is userspace. The _kernel_ needs to know what
> the root fs device is, before it even starts pid 1.
>
Sorry I was misleading by not using chronological order. The steps are;
1. Use blkid to look up the PARTUUID of the root partition
2. Add this to /etc/default/grub as GRUB_DEVICE="PARTUUID=d3554d49-02"
3. run grub-mkconfig
4. Reboot
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prev parent reply other threads:[~2019-07-19 23:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-19 9:29 [gentoo-user] Using UUID for root disk in grub requires initramfs? Adam Carter
2019-07-19 10:27 ` Mick
2019-07-19 10:58 ` Adam Carter
2019-07-19 16:37 ` [gentoo-user] " Ian Zimmerman
2019-07-19 16:59 ` Mike Gilbert
2019-07-19 23:19 ` Adam Carter [this message]
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