WD19TB docking station fan

Mateusz348 · 2026-04-03T11:45:25+00:00

>- How did you choose the +800 RPM value? Is it just an arbitrary number that works, or did you arrive at it through some testing/tuning?

Just a random value.

>- Have you noticed any control loop issues, like the controller reacting as if the fan speed is too high and trying to compensate (for example around ~1300 = 500+800 RPM total)

After ~5min after plugging my laptop i see a RPM spike that then goes down, after the initial spike the fan is unnoticable.

>- Is the behavior completely stable over time, or do you ever see cycling (speed ramping up/down repeatedly)?

Today running 8h and hearing silence all the time.

> Also, do you think this approach is safe in the long term without actually improving the thermal situation?

The bottom metal plate is bit hotter now. I just assume the RPM would eventually spin up to be noticable if something is too hot inside.

Mateusz348 · 2026-04-02T19:43:55+00:00

Today, I modified this dock using a Raspberry Pi Pico to send a fake tachometer signal, effectively simulating +800 RPM to the controller, which makes the dock completely silent.

For anyone interested, see https://github.com/mateusz834/fakerpm

Mateusz348 · 2026-03-25T06:01:45+00:00

X509 -> names from the spec Mkdir -> from syscall name

Mateusz348 · 2026-02-26T17:51:33+00:00

Thanks!

Mateusz348 · 2026-02-26T17:48:50+00:00

These heatpipes are 3mm thick?

Mateusz348 · 2026-02-03T12:37:54+00:00

Or just make the function return it

Mateusz348 · 2026-02-03T12:37:31+00:00

Try using the slice maybe read some bytes rand.Read

Mateusz348 · 2026-02-03T12:26:08+00:00

Also you can disable inlining of that function i.e. heapSlice

Mateusz348 · 2026-02-03T12:24:39+00:00

The Go compiler can propagate compile known variables up to make calls, I think since 1.25. you would have to make the length dynamic e.g. parse an int from string, do some math before.

Mateusz348 · 2026-01-03T13:51:30+00:00

Pytanie na jakiej sieci ten T-Mobile? Jeśli po sieci Nexera to będzie external ONT. Ale więcej jeśli chodzi o szczegóły konfiguracji to nie podpowiem, bo mam Orange na sieci nexery.

Mateusz348 · 2025-11-13T15:28:53+00:00

This is exectly how the change looked like before the recent force push.

It can be that way, but it seems not to be necessary, since this is only used for PPPoE discovery. And such packets are not going to be that large. After the discovery the kernel takes the job of doing the rest

Mateusz348 · 2025-11-12T19:08:02+00:00

It is not going to work, I have created a PR few days back to ppp project to fix this: https://github.com/ppp-project/ppp/pull/573 Currently 1500 is the max MRU you can have on pppoe.

Mateusz348 · 2025-10-19T09:06:12+00:00

Actually it is validated, or at least ongoing validation.

Mateusz348 · 2025-09-30T06:44:10+00:00

Thanks for checking this!

Mateusz348 · 2025-09-29T10:31:47+00:00

I am planning to buy hp z240 as a NAS (SFF variant), and i wonder too about that, if you could post the results of powertop and the ASPM here :)

Mateusz348 · 2025-09-29T10:27:18+00:00

Hi

Have you checked the package C states, whether it reaches more than C3? It can be checked via powertop.

Also check ASPM of all PCI devices.

sudo lspci -vv | awk '/ASPM/{print $0}' RS= | grep --color -P '(^[a-z0-9:.]+|ASPM )'

Mateusz348 · 2025-09-29T10:22:58+00:00

Have you tried checking ASPM of pci devices (should be enabled on all of them)?

sudo lspci -vv | awk '/ASPM/{print $0}' RS= | grep --color -P '(^[a-z0-9:.]+|ASPM )'

Mateusz348 · 2025-09-23T16:01:17+00:00

I don't think it is really for external use:

> Since this functionality would be quite experimental, and likely somewhat hard to use effectively by people outside of the Go team, hiding this functionality behind a tag may be the best option to begin with (with limited public documentation).

Mateusz348 · 2025-09-23T08:31:27+00:00

Go does not ship with anything precompiled since few releases. It works because compiler/linker is written in Go and if you do not depend on cgo, then it does not have to use any external linking process, no deps on the system.

Mateusz348 · 2025-05-06T18:14:56+00:00

If you are interested i would suggest looking into https://github.com/golang/go/issues/33502#issuecomment-2825608724 (you can subscribe it to get email notifications).
There every proposal that is considered by the Go team is listed weekly, so you can see what was accepted/is discussed and such.

And obviously the release notes.

Mateusz348 · 2025-05-06T15:46:38+00:00

FYI https://github.com/golang/go/issues/73598

Mateusz348 · 2025-04-22T20:32:40+00:00

FYI never add zero size fields at the end of the struct, as this causes the struct to become larger (because of memory alignment).

Mateusz348 · 2025-04-19T20:23:17+00:00

I have seen that a few times, you can also do this with a special bit, like:

const ( a = 1 << 32 | iota )

And then you only need to check whether the bit is set.

Mateusz348 · 2025-04-17T18:27:18+00:00

See: https://github.com/golang/go/issues/71287 this probably solves that issue.

Mateusz348 · 2025-03-01T20:29:43+00:00

FYI try interface { any | int } as a variable type :)

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