st_load
error = st_load(st, LD_RETENSION, flags);
error = st_load(st, LD_LOAD, flags);
int st_load(struct st_softc *, u_int, int);
if ((error = st_load(st, LD_LOAD, 0)) != 0)
st_load(st, LD_UNLOAD, SCSI_IGNORE_NOT_READY);