diff --git a/_data/rules.yml b/_data/rules.yml
index aae0373..b91c594 100644
--- a/_data/rules.yml
+++ b/_data/rules.yml
@@ -157,11 +157,11 @@ groups:
                 severity: warning
               - name: Host unusual disk read latency
                 description: Disk latency is growing (read operations > 100ms)
-                query: "rate(node_disk_read_time_seconds_total[1m]) / rate(node_disk_reads_completed_total[1m]) > 0.1"
+                query: "rate(node_disk_read_time_seconds_total[1m]) / rate(node_disk_reads_completed_total[1m]) > 0.1 and rate(node_disk_reads_completed_total[1m]) > 0"
                 severity: warning
               - name: Host unusual disk write latency
                 description: Disk latency is growing (write operations > 100ms)
-                query: "rate(node_disk_write_time_seconds_total[1m]) / rate(node_disk_writes_completed_total[1m]) > 0.1"
+                query: "rate(node_disk_write_time_seconds_total[1m]) / rate(node_disk_writes_completed_total[1m]) > 0.1 and rate(node_disk_writes_completed_total[1m]) > 0"
                 severity: warning
               - name: Host high CPU load
                 description: CPU load is > 80%