[6.12.0-rc3 - Spin Down not working on ZFS Formatted Array Disks (And some ZFS Pools)]

On 5/9/2023 at 9:51 AM, samsausages said:

Glad it helped you find what plugin is causing it!  
I have been trying to find out what is actually causing this, because it is unexpected behavior.  I'm wondering if it's hardware or a bios setting.
Are you per chance using an LSI HBA Card?  Mind sharing some of your hardware specs?  I'm trying to find common denominators.

Thanks!

LSI 9300-16i 16-port SAS9300-16I 12GB/s

And

LSI SAS 9200-8e PCI Express to 6Gb/s 

Are in my server

[6.12.0-rc3 - Spin Down not working on ZFS Formatted Array Disks (And some ZFS Pools)]

On 4/22/2023 at 10:58 PM, samsausages said:

So I spent more time on this and I found the culprit. it's the "ZFS Master" Plugin from IkerSaint
 

This in my log, after installing ZFS Master.
Apr 22 21:34:03 bertha emhttpd: spinning down /dev/sdb
Apr 22 21:34:06 bertha emhttpd: read SMART /dev/sdb

FYI, this only affects ZFS formatted disks/pools.  btrfs, xfs all work as expected.

Hope this is the common denominator for the others experiencing this as well!

Thanks for posting solution, I too had the same trouble and uninstalled “ZFS Master" Plugin and It  fixed spindowns too.