add disko

hosts/canopus/disko.nix

@@ -0,0 +1,48 @@
+{device ? throw "Set this to the disk device, e.g. /dev/nvme0n1", ...}: {
+  disko.devices.disk.primary = {
+    inherit device;
+    type = "disk";
+    content = {
+      type = "gpt"; # GPT partitioning scheme
+      partitions = {
+        # EFI Partition
+        ESP = {
+          size = "512M";
+          type = "EF00";
+          content = {
+            type = "filesystem";
+            format = "vfat";
+            mountpoint = "/boot";
+            mountOptions = ["defaults" "umask=0077"];
+          };
+        };
+        # Btrfs Root Partition
+        root = {
+          size = "100%"; # Use remaining space
+          type = "8300"; # Linux filesystem type
+          content = {
+            type = "btrfs";
+            subvolumes = {
+              "/root" = {
+                mountOptions = ["compress=zstd"]; # Compression for better performance
+                mountpoint = "/"; # Root subvolume
+              };
+              "/persistent" = {
+                mountOptions = ["compress=zstd"]; # Compression for persistent data
+                mountpoint = "/persistent"; # Persistent subvolume
+              };
+              "/nix" = {
+                mountOptions = [
+                  "compress=zstd"
+                  "noatime"
+                  "noacl"
+                ]; # Optimize for Nix store
+                mountpoint = "/nix"; # Nix subvolume
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}