[arch-general] install Arch on Btrfs - dual boot w10/arch - can't find vmlinuz on boot menu

[arnaud gaboury]

On Sat, Apr 1, 2017 at 12:27 PM arnaud gaboury <arnaud.gaboury at gmail.com>
wrote:

> I followed the arch install wiki to install arch alongside w10 and dual
> boot. (w10 was already installed).
> Here is a summarize of the output of fdisk:
> ----------------------------------------------
> # fdisk -l
> Disk /dev/nvme0n1
>
> /dev/nvme0n1p1........ 260M   EFI System
> /dev/nvme0n1p3......... 186G   Microsoft basic data
> /dev/nvme0n1p6.........  264.7G Linux filesystem
> --------------------------------------------------------
>
> I formatted the Linux partition with Btrfs. In short:
> # mkdir /mnt/btrfs
> # cd /mnt/btrfs
> # btrfs subvolume create /mnt/home
> I created this way 5 subvol: ROOT, home, etc, .snapshots, development
> ---------------------------------------------------------------------
>
> Then generated fstab. Here I have a first doubt about how it has been
> done. The first line is :
> ------------------------------------------
> #/dev/nvme0n1p6  LABEL=daffodil-root
> UUID=xxxyyyyy   /      btrfs
> rw,noatime,compress=lzo,ssd,subvolid=261,subvol=/ROOT,subvol=ROOT   0  0
> ----------------------------------------------
>
> ---> Question 1: why twice subvol ? Is it normal or shall I delete one?
>
> Then, still on install, I followed systemd-boot wiki. Once arch installed
> and chrooted, I did the following (*here I have doubts about my method*).
> I
> 1- mounted the EFI partition (/dev/nvme0n1p1) on /boot
> 2- bootctl --path=/boot install
> 3- copied the linux stuff (initramfs, vmlinuz...) on /boot. I finished
> with a /boot folder populated as described in systemd-boot articles.
> ---> Question 2 Then I wrote an enter in fstab for the vfat boot
> partition. I AM NOT SURE AT ALL I have to do this.
>
> Once installed finished, I rebooted. The systemd-boot menu appeared as
> expected, but didn't work as it was unable to find vmlinuz neither w10.
>
>               ~~~~
> Back to the install script, I try to fix things now.
>
> I first mounted the Linux partition in /mnt. I can see all the created
> btrfs subvol when running btrfs subvolume list
> ----------------------------
> # btrfs subvolume list -p /mnt
> ID 261 gen 179 parent 5 top level 5 path ROOT
> .....
> ID 267 gen 35 parent 261 top level 261 path ROOT/var/lib/machines
> ---------------------------------------
> A few questions:
> ------> Question 3 : why this line about systemd machines? Is it expected?
> ------> Question 4 : according to arch btrfs wiki, "Changing subvolume
> layouts is made simpler by not using the toplevel subvolume (ID=5) as /".It
> is not my case. How can I change this to avoid using the toplevel as / ?
>
> Thank you for your help and hints on:
> - why dual boot can't find OS
> - is my btrfs install clean
>


I maybe find a hint:
---------------------
# mount /dev/nvme0n1p1 /boot (mount the EFI partition)
# bootctl

Loader:
Product : systemd-boot 232
Partition: n/a
File: -- /EFI/BOOT/loader.efi
..............
------------------------------------------

*Here I should have a partition number.*