Trevor

You're using a Debian image that is built with the upstream kernel instead of the RPT maintained kernel. It doesn't have any of the optional DT overlays like sd_poll_once so...

[OP has a post on the forum saying disabling UAS didn't help for those adapters.](https://forums.raspberrypi.com/viewtopic.php?t=339591) unusual_uas.h doesn't do anything that can't be done via usb-storage.quirks in cmdline.txt.

> As you can see both drives are now being used. Something is not quite right here. It sounds like you did a straight copy of the SD to the...

> As a matter of fact. I always use a master image (pi-gen). I'll check the UUIDs out. ( I do not use SD cards btw) Sorry. Not sure why...

> However. One issue remains though. When cold-booting USB (power up) the PI ( 0xf164) the Nvme doesn't get detected. Which is a bummer. There's no easy way to backup/restore...

> If the eeprom config contains: > > `BOOT_ORDER=0xf164 PCIE_PROBE=1` > > I can boot from USB, but the PCIe link is down - no access to NVME Works for...