My system is now live, so I figured I’d share the config I ended up using, called disks.nix, which is imported through configuration.nix. Also, marking this solved. Big thanks to everyone who helped me out.
{ config, lib, pkgs, modulesPath, ... }:
{
# Media storage disks, pooled by MergerFS
fileSystems."/mnt/disks/data01" =
{ device = "/dev/disk/by-label/data01";
fsType = "xfs";
};
fileSystems."/mnt/disks/data02" =
{ device = "/dev/disk/by-label/data02";
fsType = "xfs";
};
fileSystems."/mnt/jbod" =
{ depends = [
# The `disk*` mounts have to be mounted in this given order.
"/mnt/disks/data01"
"/mnt/disks/data02"
];
device = "/mnt/disks/data*";
fsType = "mergerfs";
options = ["defaults" "minfreespace=250G" "fsname=mergerfs-jbod"];
};
fileSystems."/mnt/disks/parity01" =
{ depends = [
# The `disk*` mounts have to be mounted in this given order.
"/mnt/jbod"
];
device = "/dev/disk/by-label/parity01";
fsType = "xfs";
};
# SnapRAID
services.snapraid = {
enable = true;
#extraConfig = ''
# nohidden
# blocksize 256
# hashsize 16
# autosave 500
# pool /pool
#'';
parityFiles = [
# Defines the file(s) to use as parity storage
# It must NOT be in a data disk
# Format: "FILE_PATH"
"/mnt/disks/parity01/snapraid.parity"
];
contentFiles = [
# Defines the files to use as content list.
# You can use multiple specification to store more copies.
# You must have least one copy for each parity file plus one. Some more don't hurt.
# They can be in the disks used for data, parity or boot,
# but each file must be in a different disk.
# Format: "content FILE_PATH"
"/var/snapraid.content"
"/mnt/disks/parity01/.snapraid.content"
"/mnt/disks/data01/.snapraid.content"
"/mnt/disks/data02/.snapraid.content"
];
dataDisks = {
# Defines the data disks to use
# The order is relevant for parity, do not change it
# Format: "DISK_NAME DISK_MOUNT_POINT"
d01 = "/mnt/disks/data01/";
d02 = "/mnt/disks/data02/";
};
#touchBeforeSync = true; # Whether `snapraid touch` should be run before `snapraid sync`. Default: true.
sync.interval = "03:00";
scrub.interval = "weekly";
#scrub.plan = 8; # Percent of the array that should be checked by `snapraid scrub`. Default: 8.
#scrub.olderThan = 10; # Number of days since data was last scrubbed before it can be scrubbed again. Default: 10
exclude = [
# Defines files and directories to exclude
# Remember that all the paths are relative at the mount points
# Format: "FILE"
# Format: "DIR/"
# Format: "/PATH/FILE"
# Format: "/PATH/DIR/"
"*.unrecoverable"
"/tmp/"
"/lost+found/"
"*.!sync"
".AppleDouble"
"._AppleDouble"
".DS_Store"
"._.DS_Store"
".Thumbs.db"
".fseventsd"
".Spotlight-V100"
".TemporaryItems"
".Trashes"
".AppleDB"
];
};
}