I just installed TrueNAS baremetal on UGREEN DXP4800 pro. The initial transefer of data from my old Synology was ok. However, today, during a heavy load - I initially made my collections of different media into separate datasets (for Movies, TV series, music, books etc) and now I move them via rsync…

This is why paranoid people burn-in their HDDs for days (week[s] depending on hdd size) before putting data on them :frowning: If you could provide the full output of the smart results smartctl -a /dev/sdPROBLEMDRIVELETTERHERE and zpool status into nice preformatted tables (< at the start with /> a…

Follow the Master: [image] Drive Troubleshooting Flowchart Resources Do You Think You Have A Drive Issue? Use the flowcharts here to help you diagnose your problem. You will have a definitive answer much sooner than asking for help and waiting on a reply, fol…

@TemplarB Do not panic. You have been given good advice. Also, in my signature is a link to Drive troubleshooting charts. It is a step by step troubleshooting aid. You have the possibility of several things causing the issue. Failing drive, but not likely until you have provided some SMART data…

[image] Fleshmauler: smartctl -a /dev/sd Thanks for a quick reply. I have to admit, I don’t fully understand atm which disk is failing. zpool status -v tank shows config: NAME STATE READ WRITE CKSUM tank …

Lol, you beat me to it. My phone is slow to type on.

Thanks! I’m (relatively) calm, over 8 years of using Synology I experienced ffailed disks twice and both times after replacement all was fine. I’m reading your flow chart and on #1 there is scrub mentioned. I asked in the original post should I run scrub or not, haven’t received an answer (yet) and…

[image] joeschmuck: Failing drive, but not likely until you have provided some SMART data. So, how I run long smart tests now? which commands to use in shell?

sudo smartctl -t long /dev/sdX …not at the same time as a scrub, for the sake of checking data integrity. And if that triggers more errors, that would be a way to investigate. What’s the SATA controller/motherboard? How are the drives connected and powered?

[image] etorix: What’s the SATA controller/motherboard? ASMedia 1164 SATA controller running over a PCIe Gen3 x2 link. Motherboard - cannot find info - it seems a proprietary UGREEN design tailored for an embedded Intel Core i3-1315U processor. [image] etorix: How are the drives connecte…

[image] TemplarB: ASMedia 1164 SATA controller running over a PCIe Gen3 x2 link. Motherboard - cannot find info - it seems a proprietary UGREEN design tailored for an embedded Intel Core i3-1315U processor. I don’t want to cause any undue panic, but ASMedia controllers have historically been …

I just started making my NAS as it seems one of HDDs is failing. What to do?

TrueNAS General

etorix August 24, 2026, 6:53pm 3

Follow the Master:

Check, replace or permute your cables. Check HBA (if any) and cooling.

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I just started making my NAS as it seems one of HDDs is failing. What to do?

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