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42 lines
1.3 KiB
Nix
42 lines
1.3 KiB
Nix
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# BTRFS scrub.
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#
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# Scrubbing is the process of checking file consistency.
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# Scrubbing may be done "online", meaning you don't need to unmount a subvolume to scrub it.
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# https://nixos.wiki/wiki/Btrfs#Scrubbing
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# Btrfs scrub is "[a]n online filesystem checking tool. Reads all the data and metadata on the filesystem and uses checksums and the duplicate copies from RAID storage to identify and repair any corrupt data."
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# https://wiki.archlinux.org/title/btrfs#Scrub
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# The scrub command operates on a whole filesystem, not just individual subvolumes.
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# https://unix.stackexchange.com/a/724412
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#
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# As this command reads all data, it wears down the disk. One should not run it too often. For large, slow disks once per month should be fine.
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#
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# To run it manually:
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# sudo btrfs scrub start /
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# sudo btrfs scrub status /
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{ lib, config, options, pkgs, modulesPath, ... }:
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with lib;
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let
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cfg = config.yoda.btrfs-scrub;
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in
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{
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options = {
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yoda.btrfs-scrub = mkOption {
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type = types.listOf types.path;
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default = ["/"];
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example = ["/" "/mnt/data"];
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description = ''
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List containing each mounted BTRFS filesystem once.
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'';
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};
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};
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config = mkIf (length cfg > 0) {
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services.btrfs.autoScrub = {
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enable = true;
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interval = "monthly";
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fileSystems = cfg;
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};
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};
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}
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