The RAIDz2 storage pool of my TrueNAS has a write operation every hour, which prevents my HDD from going to hibernate

TrueNAS General
1

Is there any way to monitor the process of this write operation？
（An error occurred: Sorry, you can’t embed media items in a post.）

4

System->‘advanced Settings’-> Storage->‘System Dataset Pool:boot-pool’
I’ve configured it like this.

6

The issue still exists