Pi 5 and NVMe SSD

Indeed. Recent pi hardware and the new bookworm release have some rough edges. In this case it looks like it (the bootloader) cant find the FAT partition. Now that could be that it is making some unwarranted assumptions about where on the disk that actually is.

And the disk has it either elsewhere, or mapped internally to elsewhere.

I note that it is trying partition 0.. is that actually where the FAT volume resides?

I mean could it be simply a case of reformatting the NVME to put the FAT partition where the firmware 'expects' it to be.

I had similar issues doing all usb boot...but stumbed on a config that worked using my tame team of random monkeys....

Agreed.

It is, yes. It’s the same layout as the SD card.

The diagnostics (‘cluster 0 etc’) suggest that whatever it thinks it’s reading, it’s not getting the data that’s actually on the SSD.

Yeah. I assumed you had done all the obvious stuff.

No problems with wimpy power supplies? apparently pi's and ssds take a lot of current at boot time

It’s the official PSU.

If it’s a power issue then it has to persist for minutes while the firmware is trying to boot (BOOT_ORDER=0xf461, so it loops around candidate devices indefinitely if it can’t find anything suitable) but instantly stop as soon as it’s loaded the kernel from the boot partition on the SD card. Not impossible, I suppose, but even if I had the tools/inclination to rule it in or out, it wouldn’t change the (local) solution...

I bought a Pi5 without the official PSU, or even a Pi4 official PSU. It would run for a minute or two and then crash. Completely unusable. It is now fine with the official PSU. I hadn't realised my high wattage USB chargers achieved the high wattage by negotiating a higher voltage. A strategy which was unusable by the Pi. The Pi being non-standard irritates me.

You have a reasonable solution, so why not chill for a bit, see if a firmware release fixes it, in the fullness of time.

I did see some mention of the type of FAT causing problems, i.e. exFAT=bad.

Official *27W* power supply? At least that's what Argon recommends.

Did you configure your Pi to boot from the SSD? You didn't say anything about that. Argon seems to provide a couple of scripts to config a Pi for that. Which is a little scary but I assume those steps in their scripts are needed. Although the settings listed are just a few in eeprom config and config.txt.

I saw a list of tested SSDs somewhere, here's one:

There is an entry in config.txt that 'tells' the pi that it has a high power power supply. Otherwise it has to do an appl-ish sort of negotiation with its PSU to see if it is.

No, I was talking about the USB standard. This is from memory, so take with a pinch of salt.

I have high wattage USB C chargers for mobiles, pads etc. They quote 20 or 25 watts. Given I wasn't using any USB power draining devices, I assumed this would be OK for the Pi 5.

However, it wasn't OK, Pi 5 crashed. When I looked at the USB small print, the charger achieved a high wattage by boosting the voltage from

However, the Pi requires 5v (maybe even 5.1v) and a high 5 amps. Which is totally non-standard and makes the Pi 5 USB PSU effectively bespoke. I suppose, but haven't tested, the Pi 5 PSU is also no good to fast charge your mobile.

Presumably there is some good cost justification, but I don't like it. The Orange Pi 5 is fine on a standard USB fast charger, but it is generally lower power than the Raspberry Pi 5.

For God's sake it's high power or high current. Saying high wattage makes you look ignorant. Like all the left pondians who say "it's negative 15 today" when they mean "minus 15".

But I is ignorant. I was posting for other ignorant people so they would not make the mistakes wot I made.

I was also wrong, on a number of items:

The rPi5 charger does up the voltage for devices that expect it, still limited to 27w.

Also, like the rPi5 the orange Pi5 seems also to be just 5v, but it gets away with normal USB chargers.

Tomato Tomatoe.

High wattage *is* high power. Power is measured in watts.

High power covers all cases which is why it was emphasised we use that in the 2 years of motors and power distribution modules in my Electrical & Electronic Engineering degree. Or we used VA.

The terms wattage and ampage were never used in any of the books / teaching material I used at the time.

Yes.

(It’s directly referenced in one of my later posts, but you could work it out from the diagnostics, which show it attempting to boot from NVMe and failing.)

Something like this ought to work, though I've not tested it as I don't have a Raspberry Pi 5 (though I do have a OnePlus 7 Pro):

It would be unusual to come across a USB-PD power supply that did 5V 5A.

That rant makes you sound like a weirdo.

I have a 130W Dell USB-C PSU. It does USB-PD but strangely: it only supports 5V and 20V, both at 6.5A. So you can charge things that aren't Dell laptops, but slowly. Normally phones etc would switch up to 9, 12 or

I haven't tried it on a Pi5, but I expect it would work just fine.

Theo