Quick/easy install fails with gmirror and SATA disks
Where you have a system with SATA disks, setup a GEOM mirror with them, and then try to do the quick/easy install, it will fail by trying to use ada0s1 rather than the mirror's s1. For instance:
-<<< Executing '/sbin/bsdlabel -B -r -w ada0s1 auto'
To replicate, boot a VM with two SATA disks, setup a GEOM mirror, then hit the quick/easy install. Thinking this regressed at da90fa1e915dd3b897e6da30353b086635224efb in -tools but have not verified that.