Host unusual disk read rate
warning

Description Disk is too busy (IO wait > 80%)
Query
>>>
	
				
					(
				
			
				
					
					
						rate
					
				
			
				
					(
				
			
				
					
				
			
				
					[5m]) > .80)
				
			
    
Query Explanation

The rule computes the per‑second rate of node_disk_io_time_seconds_total over the past 5 minutes and checks if it exceeds 0.80 – meaning the disk spends more than 80 % of its time in I/O wait. The alert fires whenever this condition is true, indicating the disk is unusually busy.

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