Re: BIOS Can Not Find Disk

From	Pascal Hambourg <pascal@plouf.fr.eu.org>
Newsgroups	linux.debian.user
Subject	Re: BIOS Can Not Find Disk
Date	2017-12-03 11:00 +0100
Message-ID	<uSze1-5IT-3@gated-at.bofh.it> (permalink)
References	<uRYHv-7Wc-3@gated-at.bofh.it> <uS5fX-3tB-1@gated-at.bofh.it> <uS7hL-4Yw-1@gated-at.bofh.it> <uSnFU-6Gc-3@gated-at.bofh.it> <uSpeG-7LA-13@gated-at.bofh.it>
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Le 03/12/2017 à 00:09, Felix Miata a écrit :
> Michael Lange composed on 2017-12-02 22:33 (UTC+0100):
> 
>> On Fri, 1 Dec 2017 23:07:15 -0500 Dan Norton wrote:
> 
>> (...)
>>>> What bootloader was installed -- LILO, GRUB, GRUB2, whatever? And,
>>>> where?
> 
>>> GRUB2 to sda1.
> 
>> I did not read this thread in detail, so maybe this has already been
>> discussed, but I have just now been thinking, shouldn't grub go
>> to /dev/sda instead of /dev/sda1 ?

Sounds like there is some confusion.
When we talk about the location of GRUB, we actually generally refer to 
the location of the boot image (1st stage), in a MBR or a PBR. Here sda1 
is a "BIOS boot" partition. GRUB cannot install its boot image in a BIOS 
boot partition. This type of partition is implicitly used by GRUB to 
install its core image (2nd stage) when installing the boot image in the 
MBR of a GPT disk.

So I guess that the OP means that the core image of GRUB is in sda1, and 
the boot image of GRUB is in the MBR of sda.

>   OP made it clear his is a multiboot context. Grub on sda works for a first
> installation, but guess what happens with the next and subsequent installations
> if you allow same with them? Just as traditionally experienced with
> re-installation of Windows, each subsequent installation tries to, and typically
> does, usurp control from the former, followed by updates to the prior at least
> attempting to wrest it back, often with annoying, and time consuming, and
> sometimes fatal, consequences. With the complication that is multiboot, some
> kind of administrative intervention is inevitably needed.
> 
> The option the OP chose is to intervene ab initio. When Grub is installed to an
> MBR primary partition, and the MBR contains legacy boot code, and a boot flag is
> appropriately set, and the same policy is maintained, a subsequent installation
> makes no attempt to usurp control from the first.

That does not match my experience. A subsequent installation does not 
care about what kind of boot code is in the MBR nor whether a boot flag 
is set. You just tell the installer where you want to install GRUB and 
that's all.

> EFI and GPT were supposedly created in part to simplify hosting multiple
> operating systems,

Not GPT. GPT was just created to handle large disks and large number of 
partitions without the extended partition kludge.

Thread

BIOS Can Not Find Disk Dan Norton <dnorton@mindspring.com> - 2017-12-01 20:00 +0100
  Re: BIOS Can Not Find Disk "Thomas Schmitt" <scdbackup@gmx.net> - 2017-12-01 21:00 +0100
    Re: BIOS Can Not Find Disk Dan Norton <dnorton@mindspring.com> - 2017-12-02 19:30 +0100
      Re: BIOS Can Not Find Disk "Thomas Schmitt" <scdbackup@gmx.net> - 2017-12-02 20:30 +0100
  Re: BIOS Can Not Find Disk David Christensen <dpchrist@holgerdanske.com> - 2017-12-02 03:00 +0100
    Re: BIOS Can Not Find Disk Dan Norton <dnorton@mindspring.com> - 2017-12-02 05:10 +0100
      Re: BIOS Can Not Find Disk David Christensen <dpchrist@holgerdanske.com> - 2017-12-02 20:40 +0100
        Re: BIOS Can Not Find Disk Dan Norton <dnorton@mindspring.com> - 2017-12-03 04:50 +0100
          Re: BIOS Can Not Find Disk Dan Norton <dnorton@mindspring.com> - 2017-12-04 00:40 +0100
          Re: BIOS Can Not Find Disk David Christensen <dpchrist@holgerdanske.com> - 2017-12-04 06:20 +0100
            Re: BIOS Can Not Find Disk David Christensen <dpchrist@holgerdanske.com> - 2017-12-04 06:30 +0100
              Re: BIOS Can Not Find Disk Dan Norton <dnorton@mindspring.com> - 2017-12-04 15:40 +0100
                Re: BIOS Can Not Find Disk David Christensen <dpchrist@holgerdanske.com> - 2017-12-05 01:50 +0100
              Re: BIOS Can Not Find Disk David Wright <deblis@lionunicorn.co.uk> - 2017-12-04 16:30 +0100
                Re: BIOS Can Not Find Disk David Christensen <dpchrist@holgerdanske.com> - 2017-12-05 02:40 +0100
                Re: BIOS Can Not Find Disk David Christensen <dpchrist@holgerdanske.com> - 2017-12-05 07:00 +0100
                Re: BIOS Can Not Find Disk Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-06 00:20 +0100
                Re: BIOS Can Not Find Disk David Christensen <dpchrist@holgerdanske.com> - 2017-12-07 07:00 +0100
                Re: BIOS Can Not Find Disk David Wright <deblis@lionunicorn.co.uk> - 2017-12-05 23:30 +0100
            Re: BIOS Can Not Find Disk Dan Norton <dnorton@mindspring.com> - 2017-12-05 22:50 +0100
        Re: BIOS Can Not Find Disk Dan Norton <dnorton@mindspring.com> - 2017-12-04 03:40 +0100
      Re: BIOS Can Not Find Disk Michael Lange <klappnase@freenet.de> - 2017-12-02 22:40 +0100
        Re: BIOS Can Not Find Disk Felix Miata <mrmazda@earthlink.net> - 2017-12-03 00:20 +0100
          Re: BIOS Can Not Find Disk Michael Lange <klappnase@freenet.de> - 2017-12-03 00:40 +0100
            Re: BIOS Can Not Find Disk deloptes <deloptes@gmail.com> - 2017-12-03 05:50 +0100
          Re: BIOS Can Not Find Disk Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-03 11:00 +0100
            Re: BIOS Can Not Find Disk Felix Miata <mrmazda@earthlink.net> - 2017-12-03 12:50 +0100
              Re: BIOS Can Not Find Disk Dan Norton <dnorton@mindspring.com> - 2017-12-03 18:40 +0100
                Re: BIOS Can Not Find Disk Felix Miata <mrmazda@earthlink.net> - 2017-12-03 19:10 +0100
                Re: BIOS Can Not Find Disk Dan Norton <dnorton@mindspring.com> - 2017-12-03 20:40 +0100
                Re: BIOS Can Not Find Disk Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-03 20:20 +0100
                Re: BIOS Can Not Find Disk Dan Norton <dnorton@mindspring.com> - 2017-12-03 22:00 +0100
                Re: BIOS Can Not Find Disk Felix Miata <mrmazda@earthlink.net> - 2017-12-03 23:00 +0100
                Re: BIOS Can Not Find Disk Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-03 23:50 +0100
                Re: BIOS Can Not Find Disk Felix Miata <mrmazda@earthlink.net> - 2017-12-04 00:50 +0100
                Re: BIOS Can Not Find Disk Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-05 00:50 +0100
                Re: BIOS Can Not Find Disk Felix Miata <mrmazda@earthlink.net> - 2017-12-05 03:40 +0100
                Re: BIOS Can Not Find Disk Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-06 23:20 +0100
                Re: BIOS Can Not Find Disk Felix Miata <mrmazda@earthlink.net> - 2017-12-07 00:10 +0100
                Re: BIOS Can Not Find Disk Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-07 21:50 +0100
                Re: (OT) BIOS Can Not Find Disk Felix Miata <mrmazda@earthlink.net> - 2017-12-08 00:10 +0100
      Re: BIOS Can Not Find Disk Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-03 11:10 +0100

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