P33M

It goes a lot faster - within a minute - if I apply this patch - ``` diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index c835074435f1..140eab63708c 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -2247,7...

The problem appears to be associated with a data timeout. If I make the sdhci driver a lot more chatty I see this: ``` [ 90.058846] IRQ status 0x00000002 [...

Two things change between your 3B+ and 4B. The first is the actual hardware, the second is the kernel version. Can you try using a fresh Buster image (and after...

There's almost no point using UASP on a USB to SATA bridge with a mechanical hard disk anyway - you will get a very marginal benefit from being able to...

When in the "dead" state, what is the output of `sudo slabtop`?

The contents of `/proc/buddyinfo` would also be a useful data point to gather.

Are you specifying the `dr_mode=host` property for dwc2 in /boot/config.txt?

Your hub has poor shielding, either in the cable between the Pi and the hub, or on the hub PCB itself. https://www.intel.com/content/www/us/en/products/docs/io/universal-serial-bus/usb3-frequency-interference-paper.html You haven't specified the make or model of...

If GCC is crashing then that seems like a bug with GCC, no? In any case the bug is triggered from code in the SDK. Might be worth raising the...

Interesting, I've not heard of that one. What SWD settings were in use? Is the throughput strongly a function of SWD clock speed, or does it top out at some...