Btrfs before install notes

Set up BTRFS before install, according to this guide

(You are booted in the Arch Live environment meant to install Arch on your machine or VM)

Contents 1 Before Pacstrap 2 Partitionning 3 Formatting 4 Start mounting an dplaying with BTRFS (04:50)

Before Pacstrap

loadkeys for your keyboard

Select device with fdisk -l ; VM devices starts with V here, as in /dev/vda1 et

Partitionning

fdisk /dev/vda

• Use g to create a GPT partition table on /dev/vda1

• Use n to create a first EFI partition

• Use +300M to make it 300M in size

• Use t to change its type to 1 to make it an EFI partition

• Use n to create a second partition for the rest of the disk

• Use p to check for values and mistakes

• Use w to write the modifications and exit the interactive fdisk prompt

Formatting

• mkfs.fat -F 32 /dev/vda1
• mkfs.btrfs /dev/vda2

Start mounting an dplaying with BTRFS (04:50)

• mount /dev/vda2 /mnt

• create subvolumes with

btrfs subvolume create /mnt/@
btrfs subvolume create /mnt/@home
btrfs subvolume create /mnt/@snapshots

(Reminder : subvolumes don't create snapshots of nested subvolumes ; here @ won't contain @home or @snapshots data)