It looks like my mdraid pass-through is running as scsi-hd, so I am indeed "saved"!
'file=/dev/disk/by-id/md-uuid-{redacted},if=none,id=drive-scsi1,format=raw,cache=none,aio=native,detect-zeroes=on' -device 'scsi-hd,bus=virtioscsi1.0,channel=0,scsi-id=0,lun=1,drive=drive-scsi1,id=scsi1'
Can...