Mountroot problems on RPi3/aarch64

From: bob prohaska <fbsd_at_www.zefox.net>
Date: Wed, 01 Jun 2022 15:41:42 UTC 
Since about 05/29 mountroot has been failing on a Pi3 self-hosting -current,
using a usb mechanical hard disk.  

Anybody else seen this sort of behavior? 

Thanks for reading,

bob prohaska