Re: Debian 8 and Debian 9 Dual Boot

From	Dan Norton <dnorton@mindspring.com>
Newsgroups	linux.debian.user
Subject	Re: Debian 8 and Debian 9 Dual Boot
Date	2017-11-17 00:00 +0100
Message-ID	<uMBix-5oq-5@gated-at.bofh.it> (permalink)
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On 11/16/2017 02:27 PM, Joe wrote:
> On Thu, 16 Nov 2017 13:34:52 -0500
> Dan Norton <dnorton@mindspring.com> wrote:
>
>> On 11/13/2017 09:52 PM, Felix Miata wrote:
>>> Dan Norton composed on 2017-11-13 21:38 (UTC-0500):
>>>   
>>>> How do you set up LVM so that install does not clobber one of the
>>>> siblings? During installation, for partitioning, do you pick
>>>> "Manual" or "Guided -*" ?
>>> I don't think I've ever used Debian's, or any Debian derivative's,
>>> "guided". I can't remember the last time I didn't pick manual,
>>> after *fully* preparing in advance to my specifications.
>>>
>>> Manual will list what partitions and volumes exist, so if you've
>>> fully prepared logical volumes in advance, all that should need to
>>> be done within manual is select mount points and mount options for
>>> those you wish used. If volumes exist but are not formatted, then
>>> formatting would be a third selection using manual.
>> A better description of what I want is "multiboot", instead of "dual
>> boot" in this thread. I can see having up to 4 systems installed, all
>> Debians, on one disk drive. There is an item in [1] which I see that
>> reads:
>>
>>     6. Disable LVM support
>>
>> which is puzzling. Can multiboot be set up within LVM on one disk
>> drive? Or, is it necessary to disable  LVM, define multiple logical
>> partitions with fdisk or parted for example, install in these
>> partitions, and then set up LVM separately on each system?
> I see the date of the page is 2015, but to be honest, a lot of this
> page is completely obsolete, even more so if you're not using DOS, OS/2
> or early Windows. I would not even swear that item 6, LVM, even refers
> to the Linux system. There's certainly no problem about mixing multiple
> booting with lvm.

Glad to hear it!

>
> A volume group would normally be declared within a single old-style IBM
> partition, but doesn't have to be. Think of multiple hard drives, each
> containing multiple old-style partitions, then think of multiple lvm
> volume groups, each with multiple volumes, roughly overlaid on the
> drives and partitions but not physically matching them. A volume group
> can consist of multiple complete partitions on different drives, and
> the volumes it contains need not bear any relationship to the
> underlying partitions.
>
> Multiple OSes will still use one overall bootloader, which may or may
> not redirect to other bootloaders. It is common, therefore, to use a
> single physical partition for /boot, common to all *nix OSes, but by no
> means necessary. /boot can be an LVM volume if you wish, but a booting
> problem is slightly easier to deal with if the kernel and grub stuff is
> in a standard partition, you don't need to worry about looking up the
> lvm commands in addition to the grub set.
>
> My workstation, for example, has a 1GB primary partition for /boot, and
> the rest of the drive is a second primary partition which maps exactly
> to a volume group. The volume group is then divided into volumes, which
> mostly act like old-style partitions, at least as far as mounting goes.
> You can have a lot of them.
Apparently there are many ways to do multiboot in LVM. Is it practical 
to, on one fairly large (1TB) disk, [I can hear the snickers when 
someone reads this when 1TB is puny in a year or two] do the following:

1. Enlarge the volume group to span the entire disk (it's currently 40G).
2. Define a number of additional logical volumes, say 3.
3. Install stable in one of the lv's and have install treat it like a 
standard *partition* (logical) and have within it separate root, swap, 
/var, /tmp, and /home?

  - Dan

>   
>
> I have two drives set up the same, as I migrated from one to a newer
> one. After adjustment, the grub installation of the new drive handles
> the boot, and the kernel used by the old system lives in the /boot
> partition of the old drive. All of this could have been integrated into
> one volume group, but it's two because that's how the system evolved. I
> could pull the old drive, which I hardly ever touch now, plonk it into
> another PC and boot it with minimal fiddling about.
>
> So you have a common grub, basically from the latest installation
> unless you tell the installer otherwise, and before the installation is
> finished it should have detected any other bootable OSes anywhere in
> the hardware. You've been advised not to share other partitions, even
> /home, but several /homes can live in differently-named lvm volumes in
> the same volume group. Or not, by your preference. You can, for the
> most part, treat volumes as partitions, and not worry about whether
> they are primary or logical.
>
> You should probably track down a few tutorials on multiboot and lvm,
> read through them to get a feel for what needs doing. It's always
> difficult reading a manual for something and working out from that what
> steps you need to take to do something. Things like UEFI boot and disc
> encryption complicate things, so probably best to avoid them on your
> first attempt(s) if the hardware allows. If you're starting with a bare
> drive and your BIOS allows old-style IBM partitioning, that's the way
> to go to get the hang of this.
>

Thread

Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-13 04:50 +0100
  Re: Debian 8 and Debian 9 Dual Boot David Christensen <dpchrist@holgerdanske.com> - 2017-11-13 07:20 +0100
    Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-13 16:30 +0100
      Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-13 20:10 +0100
        Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-13 21:10 +0100
        Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-14 00:10 +0100
          Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-14 01:50 +0100
            Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-14 03:40 +0100
              Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-14 04:00 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-14 04:50 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-16 19:40 +0100
                Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-16 20:10 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-16 23:40 +0100
                Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-11-16 20:30 +0100
                Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-16 21:20 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-29 19:10 +0100
                Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-11-29 19:20 +0100
                Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-11-29 19:50 +0100
                Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-29 19:40 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-29 21:40 +0100
                Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-11-29 22:00 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-29 22:40 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-30 03:20 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-29 22:10 +0100
                Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-11-29 23:10 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-17 00:00 +0100
              Re: Debian 8 and Debian 9 Dual Boot Jonathan Dowland <jmtd@debian.org> - 2017-11-29 10:10 +0100
      Re: Debian 8 and Debian 9 Dual Boot David Christensen <dpchrist@holgerdanske.com> - 2017-11-13 20:20 +0100
        Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-14 00:30 +0100
          Re: Debian 8 and Debian 9 Dual Boot David Christensen <dpchrist@holgerdanske.com> - 2017-11-14 00:40 +0100
  Re: Debian 8 and Debian 9 Dual Boot Jochen Spieker <ml@well-adjusted.de> - 2017-11-13 10:00 +0100
    Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-13 17:00 +0100
      Re: Debian 8 and Debian 9 Dual Boot Jochen Spieker <ml@well-adjusted.de> - 2017-11-13 21:30 +0100
  Re: Debian 8 and Debian 9 Dual Boot Roberto C. Sánchez <roberto@debian.org> - 2017-11-13 13:00 +0100
    Re: Debian 8 and Debian 9 Dual Boot Roberto C. Sánchez <roberto@debian.org> - 2017-11-13 17:10 +0100
      Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-13 18:10 +0100
    Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-13 17:10 +0100
      Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-11-13 20:00 +0100
        Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-29 04:20 +0100
          Re: Debian 8 and Debian 9 Dual Boot Michael Fothergill <michael.fothergill@gmail.com> - 2017-11-29 08:10 +0100
          Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-11-29 10:10 +0100
            Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-29 19:00 +0100
          Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-29 20:00 +0100
            Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-29 20:40 +0100

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