Raspberry Pi 4 can finally boot directly from USB

Post by agustif » Sat, Sep 19, 2020, 11:18 AM UTC

loxias wrote: post #172

agustif wrote: post #92

Is thhere any way to use OS X on a Pi? Asking for a friend

I've run OS X on a very low powered Debian box before. I'd wager it could be made to run on a raspi 4 (VERY SLOWLY) with sufficient effort. (you'd have to use qemu TCG, not KVM). It would be easier to run on a SBC that uses an x86_64 chip, like the Atomic Pi, or LattePanda. I'm curious though, why in the world would you ever want to run OS X so slowly?

Post by varispeed » Sat, Sep 19, 2020, 11:58 AM UTC

grahamm wrote: post #82

systemvoltage wrote: post #32

Not a fan of Raspberry Pi. It hides behind proprietary Broadcom chip, no DSI/MIPI support and you're at the mercy of Raspberry PI for any sort of commercial implementation (RPi Zero and independent module). They do guarantee upto 2026 availability for their DIMM modules which is nice. We wanted to build commercial device using RPi but its a no go due to its blackbox nature. What they should do is to leverage their po…

I think people forget what it was designed for. It was to reboot IT education which was (is) badly floundering. It's success was so good it started to be used in small commercial applications. The Foundation tried to help fill this gap in the market with the compute module. Even though there is a lot of open source features the use of the Broadcom chipset was probably driven by cost as keeping the Pi price down was a…

Post by Abishek_Muthian » Sat, Sep 19, 2020, 12:42 PM UTC

gorgoiler wrote: post #164

Abishek_Muthian wrote: post #163

Almost all of my SBCs run from USB storage, the performance improvements over SD card are obviously night and day; but I never had success with the direct boot from USB(official methods) and had to jump from SD card to USB storage after boot i.e. having only /boot on SD card. RPi 4 being newer, I assume it's designed with USB boot in mind and perhaps USB boot might work better than earlier iterations.

Can you elaborate on the performance improvements over SD card? (I have always assumed that the SD card had a much faster, more performant bus than USB. It sounds like that’s wrong?)

Post by Abishek_Muthian » Sat, Sep 19, 2020, 12:45 PM UTC

herbcso wrote: post #201

3np wrote: post #186

Earlier quoted context omitted.

On 4, what MQTT broker(s) would you recommend? I’be been reading up a bit on different alternatives[0] for something lightweight with not too many dependencies to run clustered/HA and haven’t figured out which one to try yet. [0] https://github.com/hobbyquaker/awesome-mqtt

Mosquitto seems to be the de-facto "standard" choice for a Pi. Easy to set up and definitely lightweight.

Post by magnetised » Sat, Sep 19, 2020, 12:57 PM UTC

Dylan16807 wrote: post #175

joshspankit wrote: post #144

Earlier quoted context omitted.

At most 10ms. Sub 1ms would be awesome. And yes, definitely. If you can build in a “chromecast receiver” so that a user could cast to multiple synced speakers (at full quality), you’d definitely have my attention

It's worth noting that for two speakers playing the same audio, a 5ms offset will move the point of perfect sync by less than a meter. Going below a millisecond is definitely overkill territory.