Test NVMe Drives and PCIe Adapters (Samsung 970 EVO Plus, NGFF, etc.) about raspberry-pi-pcie-devices HOT 5 OPEN

As a note for people just receiving their CM4's, I had no luck getting the Ubuntu img (ubuntu-20.10-preinstalled-server-arm64+raspi) to boot with a Samsung 970 EVO attached via a generic vertical M.2 to PCIe x1 adapter, but when I switched to RasPiOS (2020-12-02-raspios-buster-armhf-lite) it booted without issue!

I also found it was handy to add nvme-core' to /etc/modules` to make sure it is loaded at boot time.

(Let me know if this is the wrong place for community submitted notes, happy to place elsewhere 😃 )

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@ScottHolden - Were you able to boot directly from the 970 EVO? Or did you still do the initial boot from the microSD card? (Note: I haven't tested the 12-02 release yet, so maybe they now support direct boot off NVMe, which would be amazing!).

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@ScottHolden - Did you find out what is blocking ubuntu from booting when the Samsung 970 EVO is attached? Did you manage to boot ubuntu while some other SSD model is attached? I assume you are booting off of an SD-Card or eMMC, correct? Would be very interested to see which SSD can be used in combination with ubuntu.

THX
JOsef

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CM4 and PCIe with Ubuntu
https://www.raspberrypi.org/forums/viewtopic.php?f=98&t=301016

That specific issue was resolved the downstream 5.4 Raspberry Pi OS Kernel
raspberrypi/linux@20f5f74

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Just wanna add that I purchased the Xiwai M.2 adapter via your Amazon link and it works perfectly with Kali for Pi, no setup necessary. Benchmark screenshot attached. Thanks!

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