Partitioning

This guide assumes an LVM + Btrfs setup. We are not going to create SWAP on disk but are rather going to employ Zram later on.

1. List disks with fdisk -l
2. Run cfdisk /dev/nvme0n1 (it's a little bit easier to use) Make sure that /dev/nvme0n1 is actually your desired device!
3. Partition with the following scheme

   FS Type	Size	Mount Point	Comment
   vfat	1G	/boot	EFI System
   LVM	(remaining)		Linux LVM

4. Run cfdisk /dev/sda Make sure that /dev/sda is actually your desired device!
5. Partition with the following scheme

   FS Type	Size	Mount Point	Comment
   LVM	(all)		Linux LVM

6. Create LVM physical volumes

   pvcreate /dev/nvme0n1p2   # SSD
   pvcreate /dev/sda1        # HDD
   

7. Create LVM volume group

   vgcreate VOL_GROUP_NAME /dev/nvme0n1p2 /dev/sda1
   

8. Create LVM logical volumes

   lvcreate -l 100%FREE -n lv_root vg0 /dev/sda1
   lvcreate --type cache-pool -n lv_cache -l 100%FREE vg0 /dev/nvme0n1p2
   
   # Link cache devices
   lvconvert --type cache --cachepool vg0/lv_cache vg0/lv_root
   

9. Create partitions

   mkfs.fat -F 32 /dev/nvme0n1p1        # EFI System Partition
   mkfs.btrfs /dev/mapper/vg0-lv_root   # Btrfs root volume
   

10. Create Btrfs subvolumes

    # First, mount root file system
    mount /dev/mapper/vg0-lv_root /mnt
    
    # Create subvolumes
    btrfs subvolume create /mnt/@
    btrfs subvolume create /mnt/@home
    btrfs subvolume create /mnt/@var_log@log
    btrfs subvolume create /mnt/@pkg
    

11. Mount partitions

    umount -R /mnt
    
    mount /dev/mapper/vg0-lv_root -o noatime,compress-force=zstd,space_cache=v2,subvol=@ /mnt
    mkdir -p /mnt/{boot,home,var/log}
    mount /dev/nvme0n1p1 /mnt/boot
    mount /dev/mapper/vg0-lv_root -o noatime,compress-force=zstd,space_cache=v2,subvol=@home /mnt/home
    mount /dev/mapper/vg0-lv_root -o noatime,compress-force=zstd,space_cache=v2,subvol=@var_log@log /mnt/var/log
    mount /dev/mapper/vg0-lv_root -o noatime,compress-force=zstd,space_cache=v2,subvol=@pkg /mnt/var/cache/pacman/pkg