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	2017-11-29 04:20 +0100
Message-ID	<uR14J-4iq-3@gated-at.bofh.it> (permalink)
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On 11/13/2017 01:55 PM, Joe wrote:
> On Mon, 13 Nov 2017 11:01:27 -0500
> Dan Norton <dnorton@mindspring.com> wrote:
>
>
>> Although I didn't say so, each install would have its own set of
>> directories. Please say more about how to mount the other
>> installation and share data. How to mount things in another volume
>> group?
>>
> Good advice so far, but to add a bit: all LVM groups will be seen at
> boot, and /dev will know about them. See man lvm2 and also here:
>
> https://wiki.debian.org/LVM  for complete information about the
> commands you have available. There are also numerous tutorials on the
> Net which show basic usage of the simpler commands. It's worth having a
> look when you have some spare time, as one day you'll need to know some
> of this and won't have any spare time.

Reading the wiki reveals "Grub and ? <https://wiki.debian.org/LiLo>LiLo 
are not compatible with LVM, so /bootshould be outside the storage disk 
managed by LVM." Here's what I have:

Attempts to boot normally do not work. But using Super Grub2 on a 
bootable cd and selecting "Boot manually" and picking the hd1 entry 
brings up the jessie system that the installer reports as successfully 
installed on sda3. Using fdisk to take a look:

dan@debian8:~$ sudo fdisk /dev/sda
Command (m for help): p
Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: A615A904-0620-459F-BF44-5E53E54FDF24

Device         Start        End    Sectors   Size Type
/dev/sda1       2048     411647     409600   200M BIOS boot
/dev/sda2     411648   16783359   16371712   7.8G Linux swap
/dev/sda3   16783360  151001087  134217728    64G Linux LVM
/dev/sda4  151001088  285218815  134217728    64G Linux LVM
/dev/sda5  285218816  419436543  134217728    64G Linux LVM
/dev/sda6  419436544  553654271  134217728    64G Linux LVM
/dev/sda7  553654272 1953525134 1399870863 667.5G Linux filesystem

Is there a problem here?

dan@debian8:~$ df -h
Filesystem                    Size  Used Avail Use% Mounted on
/dev/dm-0                     9.1G  3.0G  5.7G  35% /
udev                           10M     0   10M   0% /dev
tmpfs                         775M  9.0M  766M   2% /run
tmpfs                         1.9G   68K  1.9G   1% /dev/shm
tmpfs                         5.0M  4.0K  5.0M   1% /run/lock
tmpfs                         1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/sda1                     992K  142K  851K  15% /boot/efi
/dev/mapper/debian8--vg-var   8.2G  1.3G  6.4G  17% /var
/dev/mapper/debian8--vg-home  9.1G  356M  8.3G   5% /home
/dev/mapper/debian8--vg-tmp   268M  2.1M  247M   1% /tmp
tmpfs                         388M  4.0K  388M   1% /run/user/115
tmpfs                         388M   12K  388M   1% /run/user/1000

Doesn't this satisfy the statement that "/boot should be outside the 
storage disk managed by LVM" since it is on sda1?

> Look in /etc/fstab for lines beginning /dev/mapper/[volume] which will
> be the volumes mounted in the running installation. The 'mapper' is
> turning LVM volumes into things which look like partitions for many
> purposes.

Here is fstab:
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type> <options>       <dump>  <pass>
/dev/mapper/debian8--vg-root /              ext4 errors=remount-ro 0       1
# /boot/efi was on /dev/sda1 during installation
UUID=B07E-1F0B  /boot/efi       vfat    umask=0077      0       1
/dev/mapper/debian8--vg-home /home          ext4 defaults        0       2
/dev/mapper/debian8--vg-tmp /tmp            ext4 defaults        0       2
/dev/mapper/debian8--vg-var /var            ext4 defaults        0       2
# swap was on /dev/sda2 during installation
UUID=6aa1846f-34dd-424d-b02c-dbd0af037a23 none            swap 
sw              0       0
/dev/sr0        /media/cdrom0   udf,iso9660 user,noauto 0       0

Why won't it boot normally, that is without using the bootable Grub2 cd?

  - Dan

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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