Exos power management on SCALE

TrueNAS General
1

Good day,

I’m on SCALE 24.04.2. Despite the warnings I decided to go for 5x8 TB Exos 7E8 drives (ST8000NM000A-2KE101). They are very noisy. My apartment is small, and my NAS mainly servers as an archiving solution. I’m fine with having the drives spin down for the sake of silence.

The TrueNAS GUI settings are APM-based, which these drives don’t support.

I downloaded openSeaChest 24.08 and ran openSeachest_PowerControl -d /dev/sda --showEPCSettings:

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According to these settings, a spindown should happen after 10 minutes (6000x100/1000 ms). This is definitely not the case.

Am I missing something? Is there anything that could keep the drives from reaching the spindown state?

2

First - where is the system dataset - if its on the HDD’s then the pool will never power down

3

Hey, thanks for replying.

That might be the issue, I only have one dataset:

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How do I migrate the system dataset to my boot drive (sdd)?

4
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5

According to those settings, my system dataset is already on a storage pool that doesn’t use my HDDs:

grafik

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6

This is my pool which i’m trying to put on standby, notice my boot ssd (/dev/sdd) is missing. It’s definitely in the boot-pool since that one doesnt show up in the overview.

grafik
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7

Then its not writes to the system dataset that is causing the issue. Thats the first thing to look at.

Historically, getting disks to power down has met with limited success. Someone who has suceeded may be able to help - I have never tried.

There is / was a script somwhere that some have had some sucess with. Not sure where it has got to these days

8

I have no issue with trying to find out what’s keeping the drives from cycling through their power states properly. I’m also looking for ways to do that. Unfortunately, iotop doesn’t seem to be available.