Hi, I have 3 ZFS errors, but I don’t know what I should do now. I thought this is no problem, because on the other driver everything is good. So I assumed they will sync again and everything is set on 0 again. This happened after I got this alert few days ago: Pool state is DEGRADED: One or more …

Thank you for your responses! Unfortunately, the temperature issue cannot be changed, as both SSDs are in a MiniPC (Gigabyte Brix Extreme) where there is no space for a heatsink (That might just barely fit, but I need to check more closely. However, the space is extremely limited). Additionally, th…

You can try to limit the power state of the devices. Check the available states with: root@truenas[~]# smartctl -a /dev/nvme0 [...] Supported Power States St Op Max Active Idle RL RT WL WT Ent_Lat Ex_Lat 0 + 7.80W - - 0 0 0 0 0 0 1 + 6.00W …

[image] FalseNAS: Regarding the ZFS errors: Why can’t they be fixed? ZFS data shouldn’t affect the hardware, and the system should simply be able to check the other SSD for the data and correct everything. ZFS cannot fix a failing SSD - the point of ZFS is to notice any hardware failure and i…

[image] FalseNAS: ZFS data shouldn’t affect the hardware, and the system should simply be able to check the other SSD for the data and correct everything. But apparently, that has failed. Let’s be hypothetical for a moment: You have two NVMe drives, running very hot. They are in a mirror an…

Thank you very much for your help! I executed the command, and I think there isn’t a lower power level for me, right? That would be the ones with 9.39W, and they are all the same size. Could you perhaps say something about the error message in the first post? The message states that the SSD was rem…

I believe my SSDs are never in idle because I have something running in a Windows VM that continuously writes logs. This seems to raise my temperatures to over 70 degrees… hmm. I also just took apart the mini PC. Only a heatsink that is a maximum of 3mm thick would fit there. There aren’t really an…

Adding to Patrick’s hints above: https://wiki.archlinux.org/title/Solid_state_drive/NVMe#Power_saving Before drilling holes, etc. , I’d max out those settings. On my NVMe-driven system, which is reasonably cooled, this makes all the difference (20°C!).

@FalseNAS Those results are disturbing, the lower levels are all 9.39 Watts. But that is Maximum. Have you tried to lower the power level? First check your SSD temp smartctl -a /dev/nvme0 | grep -i "temp" and note the value. WARNING: Do not screw around with the nvme command. Consider it as dan…

I believe that didn’t work. The value was 3, and at some point, it jumps back to 4 and then back to 3 again root@truenas:~# nvme set-feature /dev/nvme1 --feature-id=2 --value=2 set-feature:0x02 (Power Management), value:0x00000002, cdw12:00000000, save:0 root@truenas:~# nvme get-feature /dev/nvme1 …

ZFS Errors - what now?

TrueNAS General

FalseNAS August 17, 2025, 9:53am 15

But I don’t understand that. He wants to run the SSD permanently in mode 1 (or later he tried 0). However, we had already established that modes 0 and 2 do not differ at all. Am I misunderstanding something?

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ZFS Errors - what now?

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