Why do I get iowait from preclearing drives?


Fredrick

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Hi,

 

I'm trying to understand the iowait measurement, and afaik it means the processor waits on the drives to complete its operations. What I dont understand is why I'm getting iowait from preclearing drives? These are not part of the array/cache, and shouldnt be bothering the CPU during normal operations?

 

image.thumb.png.171ad0e58757867ad0e1b4094e476fbe.png

 

Other than preclear there is not much going on atm. I've got several dockers that are just idling

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