MFC:
1.203 +6 -2 src/sys/cam/scsi/scsi_da.c
1.101 +1 -1 src/sys/geom/geom_disk.c

Reduce the noise when plugging in (USB) mass storage devices, like a 4 port
flash card reader.
Also remove an 'Opened da0 -> <random number>' which is not needed on a daily
basis (available through bootverbose).