HDDs making pattern noise when running plex.

[neverfinder]

Hi,

SO FreeNAS is running, SMART tests are also fine. I get however a very loud noise every few seconds when running the Plex server. When stopping it, the noise goes back. It's not gone but is only happening every few minutes or from time to time.

I made a video showing (well recording sound) of the noise. It happens every few seconds. FreeNas Noise Video

Here is a screenshot of the disks, network, and shell from that time. At the end I switched Plex of again and the line drops down again.



Any Ideas what could be causing it? Is so much access unhealthy for the drives? Or just a noise which is anyoing?

 

[Ericloewe]

You forgot to mention what model of disks you have. It sounds a bit ominous, so make sure any idle timers are disabled.

 

[neverfinder]

8x10TB RAIDZ2 (3x10000GB Hitachi Ultrastar He10 0F27452 256MB 3.5" (8.9cm) SATA 6Gb/s 5x Seagate Enterprise Capacity 3,5" 10TB)

What are idle timers?