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Clicking HDD in NAS: not 100% sure which one (lemmy.blackeco.com)

submitted 1 month ago by BlackEco@lemmy.blackeco.com to c/selfhosted@lemmy.world

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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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[–] Impromptu2599@lemmy.world 54 points 1 month ago (3 children)

Use a long screwdriver and touch the housing of the drive with the tip and then put the handle up to your ear. You will hear the tick very loud on the bad drive

[–] BlackEco@lemmy.blackeco.com 25 points 1 month ago* (last edited 1 month ago) (3 children)

Ah, good idea! ~~I just don't have any non-magnetic screwdriver at home, I'm afraid as to what might happen if I get its magnetic tip close to a drive.~~

Oh wait, I found a lousy screwdriver, it works like a charm! It's definitely the bottom one. Thank you very much!

[–] frongt@lemmy.zip 19 points 1 month ago

Nothing. The field isn't strong enough to affect the drive. They have much stronger magnets inside them all the time.

You could just use any other object too.

[–] over_clox@lemmy.world 11 points 1 month ago

Don't worry about magnetic screwdrivers, the drives themselves have way stronger magnets for the head arm actuators.

Glad you found the failing drive though 👍

[–] mumblerfish@lemmy.world 2 points 1 month ago

Hm, I should have asked... When I had a similar problem I just unplugged disk by disk from my raidz2 to find the right one. Good that you found a better way.

[–] lime_red@lemmy.world 7 points 1 month ago

I knew I couls trust you when I saw the stethoscope around your neck.

[–] over_clox@lemmy.world 7 points 1 month ago

Interesting approach, makes sense.

Coming from automotive repair and using a section of hose to narrow down sounds.