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Re: How to Boot with LVM

From ray <ray@aarden.us>
Newsgroups linux.debian.user
Subject Re: How to Boot with LVM
Date 2015-09-10 02:40 +0200
Message-ID <q6Y4a-2nB-9@gated-at.bofh.it> (permalink)
References (6 earlier) <q6pSN-3LC-9@gated-at.bofh.it> <q6qOU-57i-37@gated-at.bofh.it> <q6CQ1-5nG-3@gated-at.bofh.it> <q6SUO-3A4-21@gated-at.bofh.it> <q6Y4a-2nB-11@gated-at.bofh.it>
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On Wednesday, September 9, 2015 at 2:10:04 PM UTC-5, Pascal Hambourg wrote:
> ray a écrit :
> > On Tuesday, September 8, 2015 at 8:10:08 AM UTC-5, Pascal Hambourg wrote:
> > 
> >> After booting the HDD system with rEFInd, running 'grub-install' should
> >> reinstall the bootloader properly. See also useful options in my
> >> previous message.
> > 
> > Yes, it is now booting.  This is with the rEFInd stick: <This is booting the HDD instance through the rEFInd stick>
> > root@mc:/boot/efi/EFI# mount /dev/sdf1 /boot/efi
> > mount: /dev/sdf1 is already mounted or /boot/efi busy
> >        /dev/sdf1 is already mounted on /boot/efi
> 
> Which instance did you boot with rEFInd ?
I have only been able to boot the HDD instance.  When I navigate to the SSD instance, nothing is there.

> /dev/sdf is one of the SSD used for RAID 0 and LVM, right ?
/dev/sdf is a HDD, no md or LVM.
> 
> > root@mc:/boot/efi/EFI# apt-get install --reinstall grub-efi
> 
> Note that grub-efi is a dummy package which depends on either
> grub-efi-amd64 or grub-efi-ia32 depending on the installed architecture.
> Reinstalling it does nothing.
> 
> > root@mc:/boot/efi/EFI# grub-install /dev/sdf
> > Installing for x86_64-efi platform.
> > Installation finished. No error reported.
> 
> The device name is not used by grub-install with an EFI target.
> You could have tried to use the option --boot-loader-id I mentioned in
> a previous post.
Which device name is not used by grub-install?
I did not find a way to use --boot-loader-id.  I googled this exact phrase and did not find anything but this posting.  How do I use it?

> 
> > root@mc:/boot/efi/EFI# file /boot/efi/EFI/debian/grubx64.efi
> > /boot/efi/EFI/debian/grubx64.efi: PE32+ executable (EFI application) x86-64 (stripped to external PDB), for MS Windows
> > root@mc:/boot/efi/EFI# efibootmgr --verbose | grep debian
> > Boot0000* debian    HD(1,GPT,87471e98-b814-4aa9-b2bc-ea4669c75565,0x800,0x100000)/File(\EFI\debian\grubx64.efi)
> 
> Looks as expected. You can check with blkid which partition has
> PARTUUID=87471e98-b814-4aa9-b2bc-ea4669c75565. If you wonder about the
> formard / in the boot entry pathname, that's because the UEFI uses
> MS-style path.
blkid shows PARTUUID=87471e98-b814-4aa9-b2bc-ea4669c75565 to be /dev/sdf1.

> 
> > A baffling point:  In rEFInd the path is /boot/efi/EFI/debian/grubx64.efi
> 
> How is it baffling ? The EFI system partition is mounted on /boot/efi
> and the path relative to the partition filesystem root is
> /EFI/debian/grubx64.efi. The EFI firmware does not care about where you
> mount the EFI system partition.
Baffling:  Viewing with rEFInd, I see /boot/efi/EFI/debian/grubx64.efi

> 
> > After booting up into the HDD instance, I get:
> 
> Booting how ? On its own or from rEFInd ?
This is after booting on its own.
> 
> > root@mc:/boot# ls -a
> > .   config-4.0.0-2-amd64  grub                System.map-4.0.0-2-amd64
> > ..  efi              initrd.img-4.0.0-2-amd64  vmlinuz-4.0.0-2-amd64
> > root@mc:/boot# cd grub
> > root@mc:/boot/grub# ls -a
> > .  ..  fonts  grub.cfg    grubenv  locale  unicode.pf2  x86_64-efi
> 
> So far so good.
> 
> > root@mc:~# cd /boot
> > root@mc:/boot# cd efi
> > root@mc:/boot/efi# ls -a
> > .  ..
> > 
> > There is nothing past /boot/efi
> 
> What's mounted on /boot/efi ?
I am not sure what it means 'what's mounted on ...'.

#mount | grep boot returns empty
#mount | grep efi returns efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)

root@md:/home/rayj# df -h /boot/
Filesystem      Size  Used Avail Use% Mounted on
/dev/sdf2       1.4T  4.2G  1.3T   1% /

# mount | column -t  returns empty

# df /boot
Filesystem      1K-blocks    Used  Available Use% Mounted on
/dev/sdf2      1408531700 4380392 1332578984   1% /

OK, a little more reading tells me /dev/sdf2 is mounted on /boot

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Thread

How to Boot with LVM ray <ray@aarden.us> - 2015-09-06 04:50 +0200
  Re: How to Boot with LVM Pascal Hambourg <pascal@plouf.fr.eu.org> - 2015-09-06 22:40 +0200
    Re: How to Boot with LVM ray <ray@aarden.us> - 2015-09-07 02:30 +0200
      Re: How to Boot with LVM Pascal Hambourg <pascal@plouf.fr.eu.org> - 2015-09-07 10:40 +0200
        Re: How to Boot with LVM ray <ray@aarden.us> - 2015-09-08 01:50 +0200
          Re: How to Boot with LVM Pascal Hambourg <pascal@plouf.fr.eu.org> - 2015-09-08 12:40 +0200
            Re: How to Boot with LVM ray <ray@aarden.us> - 2015-09-08 14:00 +0200
              Re: How to Boot with LVM Pascal Hambourg <pascal@plouf.fr.eu.org> - 2015-09-08 15:00 +0200
  Re: How to Boot with LVM Rick Thomas <rbthomas@pobox.com> - 2015-09-07 13:20 +0200
    Re: How to Boot with LVM Pascal Hambourg <pascal@plouf.fr.eu.org> - 2015-09-07 14:40 +0200
    Re: How to Boot with LVM ray <ray@aarden.us> - 2015-09-08 02:00 +0200
      Re: How to Boot with LVM ray <ray@aarden.us> - 2015-09-08 03:40 +0200
        Re: How to Boot with LVM ray <ray@aarden.us> - 2015-09-08 14:10 +0200
          Re: How to Boot with LVM Pascal Hambourg <pascal@plouf.fr.eu.org> - 2015-09-08 15:10 +0200
            Re: How to Boot with LVM ray <ray@aarden.us> - 2015-09-09 04:00 +0200
              Re: How to Boot with LVM Pascal Hambourg <pascal@plouf.fr.eu.org> - 2015-09-09 21:10 +0200
                Re: How to Boot with LVM ray <ray@aarden.us> - 2015-09-10 02:40 +0200
                Re: How to Boot with LVM Pascal Hambourg <pascal@plouf.fr.eu.org> - 2015-09-10 17:00 +0200
                Re: How to Boot with LVM ray <ray@aarden.us> - 2015-09-12 04:30 +0200
                Re: How to Boot with LVM ray <ray@aarden.us> - 2015-09-12 05:10 +0200
                Re: How to Boot with LVM ray <ray@aarden.us> - 2015-09-14 02:40 +0200
                Re: How to Boot with LVM David Wright <deblis@lionunicorn.co.uk> - 2015-09-10 18:10 +0200
                Re: How to Boot with LVM ray <ray@aarden.us> - 2015-09-12 05:10 +0200
      Re: How to Boot with LVM Rick Thomas <rbthomas@pobox.com> - 2015-09-08 10:50 +0200
        Re: How to Boot with LVM ray <ray@aarden.us> - 2015-09-09 04:10 +0200

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