this post was submitted on 07 Aug 2025
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Hello,

One of my HDDs in my NAS started clicking recently. I intend to replace it, but I want to make sure that I correctly pinpointed the faulty one.

I have 5 HDDs in my NAS and I presume it's the bottom one, as the sound seems to come from one of the 2 drives at the bottom and its activity LED stays lighted up longer than the others when clicking. (Oh yes, clicking is intermittent, the only reliable way I found to make it click regularly was to scroll ~1700 RAWs in Darktable.)

Is there any indicator that can confirm this is the faulty one? Long SMART tests obviously report nothing and all drives have the same temperature. Maybe a latency test? I'm not sure how to conduct that on TrueNAS (my pool is a 4-wide RAIDZ1 with one Hot Spare)

Thank you very much!

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[–] Ebby@lemmy.ssba.com 6 points 1 month ago* (last edited 1 month ago) (1 children)

First thing that comes to mind is a mechanic's stethoscope.

like this

Edit: basically 8adger's screwdriver trick but I have one in my Kit of Resourcefulness™

[–] Onomatopoeia@lemmy.cafe 2 points 1 month ago

The shade tree mechanic's version is a long screwdriver, press the end of the handle just in front of your ear (to the little fleshy protrusion).

You'll hear it loud n clear.