Digest mostly generated by llm, but proofread and accurate Environment TrueNAS SCALE: 25.04.x (kernel 6.12.15-production+truenas) Original HBA: LSI/Broadcom MegaRAID SAS-3 3108 (megaraid_sas, IR/JBOD mode) Current HBA: IT-mode controller on a fresh host (clean passthrough) Pool p6: RAIDZ1 of 4× 6TB…

[image] Leo_Zendo: Forum post draft (ready to paste into TrueNAS Community) Title: RAIDZ1 pool won’t import after forced spindown; one vdev stuck OFFLINE, two labels unreadable; need guidance to restore availability You might’ve wanted to adjust that after copying from ChatGPT :sweat_smile: …

We might have to wait for a real ZFS expert to show up for this situation but could you post some more information in the meantime? (complete HW information, SMART data of all disks (smartctl -x /dev/sdX)).

Thanks! Here’s full setup(fresh install of truenas on a Dell mini PC) HW info and SMART -x for all 6TB members of pool p6. Issue recap: after offlining one vdev to spin down, export + reboot, the pool won’t import (UNAVAIL/insufficient replicas). Two members have readable labels (sde1, sdf1); two h…

You should definitely stop just copy pasting stuff from ChatGPT - into this forum (the first post was way longer than needed and the second one as well (why paste the shell’s motd?)) but especially into the CLI. I am pretty sure that offlining more than one device from a RAIDZ1 wasn’t your idea but…

[image] TheColin21: Wait for an expert to show up (if they read that long AI generated post) and don’t touch that system in the meantime. Yes, and plz dont be that guy.

[image] Leo_Zendo: Is there any safe way to force ZFS to ignore the bad member and consider the OFFLINE device present (i.e., make the set 3-of-4) long enough to import read-only and flip it online? Sort of. I suspect you will need to roll back your transactions but I am not the correct pers…

Reading through the information, the pool is not recoverable in my limited opinion. This is based on: You were using a hardware RAID controller. MegaRAID even in JBOD mode is not suitable. It may work and work for years, but if / when problems happen, they can be catastrophic. See elevator seeks & …

Thanks all for the guidance. I’m starting full ddrescue imaging of the OFFLINE member (ad8810bb…/sdc) to a same-size spare, with retries and a log, and will verify labels on the clone. If that doesn’t yield readable labels, I’ll image the FAULTED member (39b0f028…/sda) next. I won’t write to the or…

Please pull the command you are attempting to use from your .zsh-histfile that you used when you “attempted to” and “forced” the spin down of all drives both in the first and second steps here: I was reducing power draw and attempted to spin down all p6 drives. Pool busy, not allowing spindown …

The full commands are very long with lots of printouts just to discover the system. Here is the digust from the full chat log: Here’s the exact command timeline you ran around “attempted” and “forced” spindown, in order, with the terminal responses. Phase A — initial spindown attempts (before rebo…

RAIDZ1 pool won’t import after force spindown command; one vdev stuck OFFLINE, two labels unreadable; need guidance to restore availability

TrueNAS General

Farout September 25, 2025, 9:57am 6

Yes, and plz dont be that guy.

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RAIDZ1 pool won’t import after force spindown command; one vdev stuck OFFLINE, two labels unreadable; need guidance to restore availability

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