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Raspberry Pi 5

raspberrypi.com

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Re: Raspberry Pi 5

#732

A NVMe compatible M.2 M Key connector (like the Rock 5 Model B [0] has) would have been really nice. I'm starting to accumulate old but good, yet small in storage space terms NVMe's which I'm no longer needing, but which would be perfect for a Raspi. Even if the PCIe bus were an older generation and not as performant as the NVMe. The microSD card slot is really great to have, to get up-and-running, but once it's clea…

You can get some rather large USB sticks these days. Amazon is awash with 928Gb units for about £10 which are probably not the best. A 256GB or 512GB from a known brand is around £30-50. There are several USB ports on a Pi and you can always boot off a SD card. Finally, if a network is available then network boot and use NFS or whatever. The RTC is a cool addition and long overdue. At work I have three Pi 3s with GPS…

Flash storage like USB sticks is a crude comparison to an SSD or NVMe with cache and a controller capable of parallel operations.

A USB flash drive is like a dumpster. Big bandwidth when the lid is open but it’s got poor performance for fetching and storing lots of things all the time.

An SSD or NVMe is more like a rolling auto tool chest. Same big metal box, but much more performant for complex and numerous read and write loads.

Or to use a computer analogy: SSD is like a hard disk, USB flash is like a tape drive.

Re: Raspberry Pi 5

#733

Hmm. I'm disappointed honestly, I was looking forward to USB-C with display port and "normal" USB-C power. Is there any reasonable option with software support that comes even close to what RPI offers? I don't want an SBC where I have to use some strange back ported, super old, kernel with little to no chance of getting updates. Maybe I should just go for an X86 board? Lattepanda Delta, or Khadas Mind whenever that's…

> Is there any reasonable option with software support that comes even close to what RPI offers? I don't want an SBC where I have to use some strange back ported, super old, kernel with little to no chance of getting updates.

aarch64-wise, not quite yet I think, but I have hope for the RK3588. https://gitlab.collabora.com/hardware-enablement/rockchip-35...

> Maybe I should just go for an X86 board? Lattepanda Delta, or Khadas Mind whenever that's released. Not even that more expensive.

Yeah, x86-64 would certainly be a safe choice if you have the budget for it. I'd add ODROID-H3/ODROID-H3+ to this list.

Re: Raspberry Pi 5

#734
post #45

I'm tired of information being vague, under-specified, or only available under NDA (if you're lucky). I'm not stupid enough to hop on this ride again. Are there any fully open (in terms of schematics, firmware) RISCV rpi-"compatibles" out there? I'd be happy to pay triple the price of this thing for a power-efficient linux-capable sbc that is open.

Genuinely curious: why does their announcement upset you so much? Most of the tech world announces products, executes a marketing strategy and then releases stock into the market. You make it sound like someone left you standing at the altar. You didn't know it existed an hour ago. If you were on a long vacation, it might have released before your return. Why get angry?

> why does their announcement upset you so much?

Why do you assume this specific announcement is what upset me? Why do you assume this has anything to do with their product marketing strategy? Why do you assume I wouldn't have gotten angry even after they released the product?

Re: Raspberry Pi 5

#735

A NVMe compatible M.2 M Key connector (like the Rock 5 Model B [0] has) would have been really nice. I'm starting to accumulate old but good, yet small in storage space terms NVMe's which I'm no longer needing, but which would be perfect for a Raspi. Even if the PCIe bus were an older generation and not as performant as the NVMe. The microSD card slot is really great to have, to get up-and-running, but once it's clea…

On a CM5, a lite or one with eMMC would suffice in combination with NVMe. I have CM4 with eMMC and use SATA w/them.

Re: Raspberry Pi 5

#736

A NVMe compatible M.2 M Key connector (like the Rock 5 Model B [0] has) would have been really nice. I'm starting to accumulate old but good, yet small in storage space terms NVMe's which I'm no longer needing, but which would be perfect for a Raspi. Even if the PCIe bus were an older generation and not as performant as the NVMe. The microSD card slot is really great to have, to get up-and-running, but once it's clea…

You can get some rather large USB sticks these days. Amazon is awash with 928Gb units for about £10 which are probably not the best. A 256GB or 512GB from a known brand is around £30-50. There are several USB ports on a Pi and you can always boot off a SD card. Finally, if a network is available then network boot and use NFS or whatever. The RTC is a cool addition and long overdue. At work I have three Pi 3s with GPS…

Or use USBv3 to NVMe enclosure. Cheap and good ones can be found on Ali.

Re: Raspberry Pi 5

#737
When the 4 came out, lots of people wished that power + video would be provided over the same port, just like we expect with almost every modern laptop. Does that exist on the Raspberry Pi 5? Hopefully I'm wrong, but it doesn't seem like it, which would be a shame.

Re: Raspberry Pi 5

#738

Earlier quoted context omitted.

Alright so 27W with heavy peripheral draw then? But 12 W still means it'll be drawing 2.4 amps instead of 1.6 when a random process decides to 100% it. I guess we can always underclock it. The real unanswered question is, does it finally have a damn sleep mode so it can save power when idle.

> The real unanswered question is, does it finally have a damn sleep mode so it can save power when idle. I dream of DIY'ing a laptop, and RPi looks like a great platform for prototyping that... until you realize there's just no sensible way to put it to sleep. Hibernate + aggressive boot time optimization?

You know it's funny, my current laptop has a weird firmware bug (certified Asus moment) where it refuses to go into sleep mode. If sleep is triggered by any OS it will straight up just shut down completely. I've lost some work the first few times I used it out of habit.

Eventually though it didn't turn out to be much of an issue, SSDs boot real fast these days anyway and I can just do a full power cycle.

Re: Raspberry Pi 5

#739
post #722

Earlier quoted context omitted.

I think you can have over a hundred different i2c devices connected to the same bus, so it'd get pretty tall if you can power them all. 10-bit i2c (not very common) can do almost a thousand. Although, you'd need specific rules if you wanted to prevent someone just layering up always-on LED boards.

Nearly all I2C devices only allow you to set 1 or 2 of the address bits though.

Yeah, if you choose I2C devices randomly, I think you can expect to only get about 50-ish on a bus before you run into a collision.

Re: Raspberry Pi 5

#740

Earlier quoted context omitted.

To be fair, the analog output of the RPi delivers a crappy low-pass filtered 11-bit PWM signal. Even the cheapest USB audio adapter will give you a better signal. (Personally, I have been quite happy with https://www.pollin.at/p/logilink-usb-2-0-5-1-audiocontroller... )

They implemented sigma-delta driver on VPU few years back: https://forums.raspberrypi.com//viewtopic.php?f=29&t=195178

Thanks, I didn't know that!
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