Yeah, wanted to comment exactly that. You could literally watch him become crazier with every upload. At first I did overlook the odd comment, but he eventually went full nutjob and I had to unsubscribe.

lspci will read the vendor and device id via PCI and use that to determine what the device is. You might want to make the output a bit more digestable / useful via lspci -s 03:00.0 -k -nn, but I’d assume the ids that match an 2070 will show up.

Could you please take the card out and provide us with a few pictures from different angles, maybe getting a good look at the actual chips?

I’d like to rule that out before chasing rabbits here.

Also, you could always run nvidia-settings, which will show information about an NVIDIA card using a different access method.

I’d still like to see the pictures of the card though ;)

We’ll get along just fine. But I will remember the kid’s face if they’re cool.

Do yourself a favor and order those filters ASAP. This stuff creeps up on you and before you know, you’re wheezing like crazy walking up 3 steps. Or you skip that step and go directly to the cancer stage.

I have been around a few of cases like this and man does it suck to see it happen. I moved shops and now have an easily accessible spot for PPE, literally no effort to grab a mask, protective glasses, whatever. It makes all the difference.

You’ll be even more disappointed when you find out that “Aloe Vera Microfiber” is indeed coated polyester, with a few percent of Aloe Vera extract:

https://www.comatex.cz/en/fabrics/aloe-vera-microfiber-fabric/

http://www.azyhometextile.com/sale-polyester-peach-skin-aloe-vera-microfiber-fabrics-57485532.html

Honestl, I’m equally disappointed - I was keen to learn about a previously unknown fiber.

See, that’s what I wanted to say. I had no idea such a thing existed - you learn something new every day. From what I just read now it’s a synthetic gel core with a polyester case that has somehow been coated with Aloe Vera extract?

Is that what you are referring to? If so, I’d definitely like to try the gel core, but I’m not at all convinced as far as the case is concerned - the coating would wash out anyway, and I hate Polyester with a passion.

Taking out the gel core and replacing the case with cotton or linen is something that would I try though.

Really all of them? Camel fur? Natural latex? Lyocell? Sheep wool? Pinus cembra shreds? Horse hair? Kapok?

All I want to say is: there is a whole world of relatively unknown pillow stuffings available. This is mostly useful for people with very particular requirements or allergies.

I tried all the regular ones (cotton, different grains, down feathers) plus camel fur, latex and Kapok. Latex was great, durability was mediocre compared to the price though. Kapok became flat pretty fast.

I arrived at the same conclusions as you did: shredded foam. I’d go with natural latex, which has about the same properties and can be manufactured in an eco-friendly, sustainable fashion, but that led to me spending $120 on a pillow that didn’t last a third as long as a foam pillow for $22.

Edit: I’m also biased because I want my pillow to be washable. That helps with all kinds of allergies, plus the dirt you see coming out of the pillow… Jesus.

Great project, I like that you went all in and installed the solar panels - there is a nonzero chance I would have tested it with only a battery first, therefore creating a suboptimal solution that would have stayed around far too long, endlessly bugging me in the process.

Just one remark: the mailbox is so nice, you should definitely route a channel in the treated pine to hide / protect the blue cable better, that’d make it perfect.

Slight nitpick: Brymen handheld meters often have better specs in the handheld market, in particular when you are looking at a fixed price point.

You see a lot of Fluke meters around due to service agreement, as well as government and military contracts.

Don’t get me wrong, meters are fine, but there is no reason to spend that kinda money at home, unless the service manual of your washing machine explicitly states all measurements are to be done by a Fluke meter.

They do make managed switches, but just to be completely clear, my comment was mostly hyperbole. I just found the general combination of security - mindedness and cheap Chinese hardware curious / amusing.

I was wondering… that tp-link probably negates anything remotely resembling security on its own. But yeah, you can update some of these noname boxes easily, others, not so much.

I have dealt with (in a professional capacity) Chinese manufacturers that are under the impression they do not have to provide a working build tree for the kernel, let alone firmware, so its a gamble if you’re not talking to a major Chinese name brand. Mind you, I was ordering hundreds of those boxes, so there was some leverage.

I can second that. We had some really good experiences with ClickHouse and its performance. If it fits the bill, it’s a very nice piece of software.

Hey, great that you chimed in, I agree with the points you’re making. As for my remark regarding amplitude, what I wanted to convey was: in the measurement scenario using the PhyBox smartphone app, OP should see an overall smaller signal envelope if the NAS was properly decoupled, compared to the previous plot.

As for your comment regarding the Nyquist theorem, PhyBox maintains a list of devices and their sensors so it would be possible to lookup the available sampling frequency. There are other factors potentially limiting the sample rate (e. g. switching offl microphone access for the app on Android), but it’s a good starting point.

https://phyphox.org/sensordb/

However, I think we agree this should be solvable without much theoretical effort.

Honestly, I think your approach using the MEMS accelerometer in your smartphone is fine - just make sure to tape the back of your phone firmly to the board to get a rigid connection. This will be of particular importance if you want to do any kind of tuning, as you might measure spurious frequencies if the device is not properly attached.

Smartphone accelerometers are actually used in civil engineering / industrial applications to determine frequencies of e. g. bridges or check for bearing wear. If you are interested, here are some papers:

https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9804/98040C/Identification-of-the-operational-frequencies-of-300-bridges-using-smartphones/10.1117/12.2222097.short#_=_

https://www.scielo.br/j/lajss/a/ZnWZ8T86HHBLFvdksCh7g9s/?lang=en

https://www.mdpi.com/1424-8220/19/14/3143

https://www.mdpi.com/1424-8220/15/2/2980

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9824767/

That being said, the accuracy of the frequency readings is not super important for your application, as what you are after is pretty much only a reduction in amplitude. I would assume spinning hard drives show different responses to different vibrational frequencies, but I did not have the time to research this myself. However, here are two papers that explore what you are trying to do, which I will link since they also mention a few related papers that show the impact of vibrations on hard drives:

https://link.springer.com/article/10.1007/s00542-012-1592-z

https://content.iospress.com/articles/shock-and-vibration/sav00458

This would in theory incentivise to optimize dampening certain frequencies, but I suspect you will quickly get into the realm of overengineering / premature optimization, as the dampening might be good enough to tune out all relevant frequencies without simulations or tuning etc. However, it’s still certainly a worthwhile effort for educational purposes though.

As for a practical approach, I’d probably simply start out with some super cheap foam obtained at the nearest home improvement or crafts store and see how a sandwich using that affects signal amplitude. You could even introduce artifical vibrations using a DC motor with a weight mounted off-center on the shaft, which you can get ready-made for next to nothing on eBay (“vibration motor”, ~ $2).

If you want to get into tuning / experiment / analysis territory, I would like to include additional motivation. Not only might proper decoupling increase the lifetime of your drives, but it could also improve performance. I will include the following video as humorous proof of that:

https://www.youtube.com/watch?v=tDacjrSCeq4

P.S.: I firmly believe that research should be freely accessible, so I feel obligated to mention that all papers linked above are, if not available for free on their respective webpages, obtainable via a certain scientific hub.

I believe it doesn’t really matter much whether you want to protect the environment from vibrations of the machine vs. protecting the machine from vibrations of the environment - in both cases, decoupling the systems is what you want to achieve.

Eventually, you want to build a TMD: https://en.m.wikipedia.org/wiki/Tuned_mass_damper

I personally had to deal with the case of a large format CNC machine transferring stepper motor vibrations into an adjacent office via the wall-mounted brackets it was sitting on. People started to complain shortly after installation since the noise was very audible in the otherwise quiet working environment.

The solution involved placing the machine on a plate mounted via rubber decouplers (see https://www.dayco.com/en/product/decouplers) which in turn was mounted to a shop-built TMD using a rubber core sandwiched between two foam plates. The rubber core works as both mass and absorbs additional vibrations. It was built following a paper, but unfortunately, that was around 7 years ago and I’m not sure I’ll be able to dig the publication out again.

You can in fact simulate the TMD and do the tuning (see for example https://www.mathworks.com/help/simscape/ug/mass-spring-damper-in-simulink-and-simscape.html , though dedicated software packages also exist) but in all honesty, that will probably be overkill for your case.

Having your NAS sit on a 1/2" board of baltic birch plywood resting on a foam sandwich is probably going to do the trick in your case. You can easily create such a sandwich using foam, a rubber mat and some spray glue. Different foam densities will give different results and yield different “tunings” - you may have to play around with this a bit. I could imagine you’ll most likely even be able to skip the second decoupling step (rubber feet/decouplers), in the aforementioned case the second decoupling allowed for another set of frequencies to be dampened (via a different overall rubber hardness) but also brought overall amplitude down.

Don’t use super soft foam, as this will yield a wobbly base, something you probably want to avoid for your NAS. Also, make sure not to attach the base board to anything else apart from the foam, or you’ll transmit vibrations again. If you don’t like the appearance of the foam, you can build a small fence around it that goes up to the top of the base plate.

All that being said, there are also ready-made solutions like speaker dampening feet available: https://www.amazon.com/Tertullus-Speaker-Isolation-Feet-Anti-Vibration/dp/B09QC2L7N3

Most of them are made to decouple subwoofers, so they might fit into the frequency spectrum you specified. Those couls certainly be an affordable and rather quick way to solve the problem.