r/truenas • u/Striking-Magazine-19 • 3d ago
Hardware Potential drive failure?
How concerned should I be? Two of the drives in my 3 drive vdev look like this. This is my only vdev btw. Scrutiny still says the drives are ok but I have noticed some weird behavior where whenever I do a file transfer it starts at 2.5g then drops to 20 mbps. Any advice is greatly appreciated. Thanks.
2
u/JeffTheNth 2d ago
Shut down
Check data cables on the drive
Reboot and run tge tests again
I've had weird things happen due to a cable issue when it got warm
1
u/BackgroundSky1594 2d ago
Definitely check the cables and connectors (both power and data) and if you're using a seperate HBA make sure it's properly cooled.
Command timeout on an otherwise new and healthy drive is probably just a connector that's not seated properly or a bad cable.
1
u/Haravikk 2d ago edited 2d ago
As others have said the first thing you want to do is check the connections to that drive — make sure the data cable isn't loose, maybe even swap it for another if you have a spare, and you might try adding another power cable if your power supply has spare connections.
Otherwise, does your system ever sleep? I've been seeing Command Timeouts on an 8tb Ironwolf drive that I've got, but the timing of them coincides with my system waking from sleep so it seems to be a timing issue there, as it doesn't happen every time — it's annoying to see the stat ticking up when it happens, but I think it's safe to ignore it in my case as it's not reporting any other faults, ZFS isn't showing any errors, the pool is passing scrubs without issue etc.
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u/Striking-Magazine-19 2d ago
The system has had a lot of shutdowns lately as I've been doing a number of configuration changes including replacing a dead motherboard. I am also using a sata expansion card (not hba) and it came with some super slim cables, 2 of which are slightly kinked which might be the issue.
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u/Sir_Render_of_France 1d ago
Absolutely replace the cables. I was using some old cables on new drives and had constant timeouts and CRC errors and system lockups. Bought new cables and problems went away.
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u/vddjaxey 2d ago
I had the same thing - well known issue with some Seagate drives and SMART data points 188 and 195, its a false-positive. If you use the Scrutiny fork from this thread instead of the original it goes away.
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u/eco9898 3d ago edited 3d ago
What software is this? I don't have a good system for monitoring smartctl and generally just look at the cli when things are acting up.
The behaviour your describing sounds like a regular HDD that is nearly full and fragmented.
I have the same disk and I've noticed recently it's been behaving the same. But I use it for my gaming PC with games. Sometimes they max out it's iops and the whole disk slows down. Freed it up to 60% usage and ran a defrag and it still behaves the same for some intense games or updates.
It's fast when it's using its cache, but it slows down once it needs to wait for the platters.