The pi4 has a native pcie slot and there are nvme hats that take advantage
of this to mount nvme drives to this pcie bus.

On Fri, May 31, 2024, 7:50 PM Jim via PLUG-discuss <
plug-discuss@lists.phxlinux.org> wrote:

> I have a Raspberry Pi4 and I've had trouble with some adapters for some
> sata ssds I've tried using with it. I have several usb3 adapters that
> don't support uasp. When I try using one, the speeds are slow and I get
> lots of errors.  I looked this up online and everything I saw about it
> said that some usb3 ssd adapters don't support uasp and a  system trying
> to use it will get slow speeds and lots of errors. Some of the stuff I
> read says how to get the manufacturer and model id numbers and put them
> in /boot/firmware/cmdline.txt so the system will not try using uasp with
> those devices.  In  the cmdline.txt file on my Pi4, I have the following
> at the front of cmdline.txt:
>
> usb-storage-quirks-152d:0578:u (152d:0578 is the manufacturer and
> device numbers for the device in question.)
>
> This is supposed to tell the system not to use uasp on the specified
> device.  I tried that, and rebooted the pi, but still have the problem.
> The only way I got it working was to plug the second drive into a usb2
> port.  It's a bit slower, but works.
>
> Here it told how to identify the device and how to modify cmdline.txt to
> tell the system not to use uasp with the device
> https://forums.raspberrypi.com/viewtopic.php?t=245931
>
> The cmdline.txt file starts with usb-storage-quirks-152d:0578:u
>
> Typing lsusb identifies the device.
>
> $ lsusb
> Bus 002 Device 002: ID 14b0:0206 StarTech.com Ltd.  Vi550 S3  This one
> works. The drive the pi boots from is connected to it.
>
> Bus 001 Device 003: ID 152d:0578 JMicron Technology Corp. / JMicron USA
> Technology Corp. JMS578 SATA 6Gb/s This is the one I'm having trouble with.
>
> It does not work without lots of errors. I only got it working by
> putting it in a usb2 port.  Is there any way to test whether or not a
> device supports uasp?
>
> Thanks for any help you can send my way.
>
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