Xhci error when mounting usb drive on Netgear r8000

I have an Netgear r8000 that was previously serving as a secondary AP and backup server with DD-WRT. I've since reinstalled with OpenWRT 18.06 and have been having trouble reproducing my setup, specifically because my external USB3 hard disk does not make a /dev/sda entry when turned on. I'm assuming this sequence in dmesg is the reason:

[  335.040264] usb 4-1: new SuperSpeed USB device number 3 using xhci-hcd
[  335.072566] xhci-hcd 18023000.xhci: ERROR: unexpected command completion code 0x11.
[  335.120442] uas: probe of 4-1:1.0 failed with error -12

Any suggestions as to what I might try to resolve this?


Just to make sure: You have kmod-usb-storage-uas installed?

So it seems:

root@OpenWrt:~# opkg install kmod-usb-storage-uas
Package kmod-usb-storage-uas (4.14.54-1) installed in root is up to date.