Posting this so it's easily findable.
Bought ASMedia Technology Inc. ASM2142/ASM3142 USB 3.1 Host Controller.
Had issues with my EasyStore External Hard Drive being seen.
Found: https://www.sonnettech.com/support/kb/kb.php?cat=546&expand=_a2&action=b1149#b1149
Added:
pci=disable_acs_redir=pci:12D8:2308
Edited this file:
root@UnRAID:/# vi /boot/syslinux/syslinux.cfg
append line becomes:
append initrd=/bzroot pci=disable_acs_redir=pci:12D8:2308