Just Curious - Disk Access?

[TAC]

In listening to my FreeNAS server I can hear it access the disks about once a second, see the attached from netstat and the System Processes. What would be the best way to find out exact what process is doing this? This while running netstat, and 5 jails.

If I stop netstat and all my jails the disk access sounds like it goes to about once every 8 seconds and these are the system processes:

 

[Linkman]

I would posit it's collectd, the system statistics daemon.

 

[TAC]

I would posit it's collectd, the system statistics daemon.

Huh? ;-)