Hi all,
There seems to be a bug in combination with RPI4 and 2 HDD-s are connected over same USB port. When HDD-s are present, then u-boot is not able to boot up OS from SD card. Created a FreeBSD bug report about this issue. However it seems not to be FreeBSD problem, but U-Boot bug instead.
I have to mention that all this worked with older RPI4 firmware and U-Boot 2020.10, which came with then Freebsd13-current. Some updates (including rpi firmware update) later it stopped working.
Steps to reproduce: take USB HUB, attach 2 or more HDD/usb thumb drives or something like that, connect it to RPI and try to boot up from SD card.
Longer reading and much more details can be found here:
Newer bug report created by Roger Leigh: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256441
And an older one: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253983
Regards,