diff --git a/nixos/modules/monitoring/exporters/megacli2prom.nix b/nixos/modules/monitoring/exporters/megacli2prom.nix
index 83370b5989321121ca3bf9cb5d9bf272cf18f00f..adc69934d9e6b88c2f6585c428741e1f285a076a 100644
--- a/nixos/modules/monitoring/exporters/megacli2prom.nix
+++ b/nixos/modules/monitoring/exporters/megacli2prom.nix
@@ -28,7 +28,8 @@ in {
         How often to do it?
         See https://www.freedesktop.org/software/systemd/man/systemd.time.html#Calendar%20Events
       '';
-      default = "hourly";
+      # Every five minutes.
+      default = "*:0/5";
     };
   };
 
diff --git a/nixos/modules/monitoring/server/grafana-dashboards/resources-overview.json b/nixos/modules/monitoring/server/grafana-dashboards/resources-overview.json
index f095bbdff7ad112e2fbcd9227b66ec1297304018..745f7b7ff03d9a0a4e93fc50946f8066fb08e7b9 100644
--- a/nixos/modules/monitoring/server/grafana-dashboards/resources-overview.json
+++ b/nixos/modules/monitoring/server/grafana-dashboards/resources-overview.json
@@ -1438,7 +1438,7 @@
         ],
         "executionErrorState": "alerting",
         "for": "5m",
-        "frequency": "15m",
+        "frequency": "5m",
         "handler": 1,
         "name": "Degraded RAID alert",
         "noDataState": "ok",