Btrfs before install notes

Revision as of 16:03, 29 November 2023 (view source) Admin (Talk | contribs) ← Older edit		Revision as of 16:26, 29 November 2023 (view source) Admin (Talk | contribs) Newer edit →
Line 9:		Line 9:
	Select device with '''fdisk -l''' ; VM devices starts with V here, as in /dev/'''v'''da1 et		Select device with '''fdisk -l''' ; VM devices starts with V here, as in /dev/'''v'''da1 et
−	==Partitionning==	+	===Partitionning===
	fdisk /dev/vda		fdisk /dev/vda
Line 27:		Line 27:
	* Use '''w''' to write the modifications and exit the interactive fdisk prompt		* Use '''w''' to write the modifications and exit the interactive fdisk prompt
−	==Formatting==	+	===Formatting===
	* mkfs.fat -F 32 /dev/vda1		* mkfs.fat -F 32 /dev/vda1
	* mkfs.btrfs /dev/vda2		* mkfs.btrfs /dev/vda2
−	==Start mounting an dplaying with BTRFS (04:50)==	+	===Start mounting and playing with BTRFS (04:50)===
	* mount /dev/vda2 /mnt		* mount /dev/vda2 /mnt
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	btrfs subvolume create /mnt/@home		btrfs subvolume create /mnt/@home
	btrfs subvolume create /mnt/@snapshots		btrfs subvolume create /mnt/@snapshots
		+
		+	* Check your existing subvolumes and their ID :
		+
		+	btrfs subvolume list /
	(Reminder : subvolumes don't create snapshots of nested subvolumes ; here @ won't contain @home or @snapshots data)		(Reminder : subvolumes don't create snapshots of nested subvolumes ; here @ won't contain @home or @snapshots data)
		+
		+	* Create mountpoints
		+
		+	mkdir /mnt/efi
		+	mkdir /mnt/home
		+	mkdir /mnt/.snapshots
		+	mkdir /mnt/btrfsroot
		+
		+	* Then Umount the actual /dev/vda2 to replace by the '''@''' subvolume

---

Revision as of 16:26, 29 November 2023

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 1.1 Partitionning 1.2 Formatting 1.3 Start mounting and playing 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 and playing 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

• Check your existing subvolumes and their ID :

btrfs subvolume list /

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

• Create mountpoints

mkdir /mnt/efi
mkdir /mnt/home
mkdir /mnt/.snapshots
mkdir /mnt/btrfsroot

• Then Umount the actual /dev/vda2 to replace by the @ subvolume