Constant write I/O in FreeNAS

[Svarto]

Hi,

I have a problem where my server is doing random writes consistently while no scrub is actually taking place. This makes me a little worried as I don't know if what is going on is normal or if I have something malfunctioning / malware / hacked.

I would greatly appreciate some insight here!

I have screenshots below of what I see when I write topstat -m io:

Collectd writes on a regular basis significantly:

Constant small writes from nginx:

 

[styno]

This looks like normal behavior to me, the system is gathering performance data so you can have it's usage stats in the GUI.

 

[Chris Moore]

I would greatly appreciate some insight here!

The system is 98% idle.
FreeNAS is an enterprise-grade file-server. It is not designed to spin the drives down and do nothing.
You are worried about something that is normal activity.