Raspberry Pi 4 can finally boot directly from USB

Post by MisterAV » Sat, Sep 19, 2020, 12:23 AM UTC

joshspankit wrote: post #106

blibble wrote: post #96

Earlier quoted context omitted.

I actually tried this and it turned out to be quite a bit more complicated than predicted, due to clocks on the pis being slightly different "I'll just sling udp multicast of the PCM samples around the network, can't be that hard right?" ended up using MPD with pulseaudio over TCP, and they get out of sync after a few minutes, but good enough

The different clocks is a real hurdle. I have to give credit to Apple on this one, as they had the genius idea to make the buffer >1s, and send control messages independent of the audio stream. There’s gotta be a way to do it with PTP and the same ideas but clearly it’s either an extremely difficult problem, too niche, or both.

Post by GekkePrutser » Sat, Sep 19, 2020, 12:59 AM UTC

rektide wrote: post #56

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…

Largely agreed. There's been some very dedicated people open sourcing support for RPi pieces, which is amazing to see, but it's been herculean efforts over many years with seemingly no support. This is unfortunate & sad, but at least things have been moving forward. The much sadder story is wifi routers. OpenWRT used to have pretty broad support for a wide range of routers, but there have been less & less people maki…

Post by GekkePrutser » Sat, Sep 19, 2020, 1:06 AM UTC

ComputerGuru wrote: post #125

jagger27 wrote: post #85

Earlier quoted context omitted.

Other commenters in this thread have mentioned netbooting their Pis to avoid that exact issue. A typical USB flash device won't be any more reliable than an SD card, though it might be better cooled.

> A typical USB flash device won't be any more reliable than an SD card, though it might be better cooled. That’s not strictly true, as the USB storage controller abstracts away the NAND and can manage wear leveling and free blocks. There are also more “enterprise class” USB sticks than SD cards, and the USB3 interface to USB drives is much faster than pretty much any SD card interface. Best SD cards and best USB dri…

Post by bscphil » Sat, Sep 19, 2020, 1:13 AM UTC

threentaway wrote: post #45

mmastrac wrote: post #36

Earlier quoted context omitted.

What are you using for a filesystem? NFS? My worry would be saturating the older 100Mbit connections when downloading things like docker images.

The Pi4 can do 300-350mbps, which is faster than most people's internet connection.

Post by pmarreck » Sat, Sep 19, 2020, 1:39 AM UTC