to_be_added.md

Autotier experiment

libsnappy-dev

[3:0:0:0] disk ATA WDC WD180EDGZ-11 0A85 /dev/sdc << parity /mnt/parity1 [3:0:1:0] disk ATA WDC WD80EFZX-68U 0A83 /dev/sdd << /mnt/btrfs-roots/mergerfsdisk1 [3:0:2:0] disk ATA WDC WD180EDGZ-11 0A85 /dev/sde << /mnt/btrfs-roots/mergerfsdisk2

mkfs.btrfs -f -L mergerfsdisk1 /dev/sdd mkfs.btrfs -f -L mergerfsdisk2 /dev/sde

add to /etc/fstab (root btrfs)

mount /mnt/btrfs-roots/mergerfsdisk1 btrfs subvolume create /mnt/btrfs-roots/mergerfsdisk1/data mount /mnt/btrfs-roots/mergerfsdisk2 btrfs subvolume create /mnt/btrfs-roots/mergerfsdisk2/data mkdir /mnt/disk{1,2}

add to /etc/fstab (data subvolumes)

mount /mnt/disk1 mount /mnt/disk2 btrfs subvolume create /mnt/btrfs-roots/mergerfsdisk1/content btrfs subvolume create /mnt/btrfs-roots/mergerfsdisk2/content mkdir -p /mnt/snapraid-content/disk{1,2} mount /mnt/snapraid-content/disk1 mount /mnt/snapraid-content/disk2

Now we can unmount the parent-root-mounts

umount /mnt/btrfs-roots/mergerfsdisk1 umount /mnt/btrfs-roots/mergerfsdisk2

mergerfs

wget https://github.com/trapexit/mergerfs/releases/download/2.33.5/mergerfs_2.33.5.ubuntu-focal_amd64.deb dpkg -i mergerfs_2.33.5.ubuntu-focal_amd64.deb

add fstab slow-storage

/mnt/disk* /mnt/storage fuse.mergerfs defaults,nonempty,allow_other,use_ino,cache.files=off,moveonenospc=true,dropcacheonclose=true,minfreespace=200G,fsname=mergerfs 0 0

Update /etc/snapraid.conf file with disks maps.

Snapper configs for each disks

snapper -c mergerfsdisk1 create-config -t mergerfsdisk /mnt/disk1 snapper -c mergerfsdisk2 create-config -t mergerfsdisk /mnt/disk2

verify

snapper list-configs

instsall snapraid-btrfs setup and then verify with

snapraid-btrfs ls

install runner

git clone https://github.com/fmoledina/snapraid-btrfs-runner.git /opt/snapraid-btrfs-runner