diff --git a/sbin/camcontrol/camcontrol.c b/sbin/camcontrol/camcontrol.c
--- a/sbin/camcontrol/camcontrol.c
+++ b/sbin/camcontrol/camcontrol.c
@@ -1024,6 +1024,7 @@
 			/* start/stop */ startstop,
 			/* load_eject */ loadeject,
 			/* immediate */ 0,
+			/* power_condition */ SSS_PC_START_VALID,
 			/* sense_len */ SSD_FULL_SIZE,
 			/* timeout */ timeout ? timeout : 120000);
 
diff --git a/sys/cam/cam_periph.c b/sys/cam/cam_periph.c
--- a/sys/cam/cam_periph.c
+++ b/sys/cam/cam_periph.c
@@ -1791,6 +1791,7 @@
 					/*start*/TRUE,
 					/*load/eject*/le,
 					/*immediate*/FALSE,
+					/*power_condition*/SSS_PC_START_VALID,
 					SSD_FULL_SIZE,
 					/*timeout*/50000);
 			break;
diff --git a/sys/cam/scsi/scsi_all.h b/sys/cam/scsi/scsi_all.h
--- a/sys/cam/scsi/scsi_all.h
+++ b/sys/cam/scsi/scsi_all.h
@@ -4326,7 +4326,8 @@
 void scsi_start_stop(struct ccb_scsiio *csio, uint32_t retries,
 		     void (*cbfcnp)(struct cam_periph *, union ccb *),
 		     uint8_t tag_action, int start, int load_eject,
-		     int immediate, uint8_t sense_len, uint32_t timeout);
+		     int immediate, uint8_t power_condition, uint8_t sense_len,
+		     uint32_t timeout);
 void scsi_read_attribute(struct ccb_scsiio *csio, uint32_t retries, 
 			 void (*cbfcnp)(struct cam_periph *, union ccb *),
 			 uint8_t tag_action, uint8_t service_action,
diff --git a/sys/cam/scsi/scsi_all.c b/sys/cam/scsi/scsi_all.c
--- a/sys/cam/scsi/scsi_all.c
+++ b/sys/cam/scsi/scsi_all.c
@@ -8984,7 +8984,8 @@
 scsi_start_stop(struct ccb_scsiio *csio, uint32_t retries,
 		void (*cbfcnp)(struct cam_periph *, union ccb *),
 		uint8_t tag_action, int start, int load_eject,
-		int immediate, uint8_t sense_len, uint32_t timeout)
+		int immediate, uint8_t power_condition, uint8_t sense_len,
+		uint32_t timeout)
 {
 	struct scsi_start_stop_unit *scsi_cmd;
 	int extra_flags = 0;
@@ -8999,6 +9000,7 @@
 	}
 	if (load_eject != 0)
 		scsi_cmd->how |= SSS_LOEJ;
+	scsi_cmd->how |= power_condition;
 	if (immediate != 0)
 		scsi_cmd->byte2 |= SSS_IMMED;
 
diff --git a/sys/cam/scsi/scsi_cd.c b/sys/cam/scsi/scsi_cd.c
--- a/sys/cam/scsi/scsi_cd.c
+++ b/sys/cam/scsi/scsi_cd.c
@@ -3406,6 +3406,7 @@
 			/* start */ TRUE,
 			/* load_eject */ load,
 			/* immediate */ FALSE,
+			/* power_condition */ SSS_PC_START_VALID,
 			/* sense_len */ SSD_FULL_SIZE,
 			/* timeout */ 50000);
 
@@ -3434,6 +3435,7 @@
 			/* start */ FALSE,
 			/* load_eject */ eject,
 			/* immediate */ FALSE,
+			/* power_condition */ SSS_PC_START_VALID,
 			/* sense_len */ SSD_FULL_SIZE,
 			/* timeout */ 50000);
 
diff --git a/sys/dev/mpr/mpr_sas_lsi.c b/sys/dev/mpr/mpr_sas_lsi.c
--- a/sys/dev/mpr/mpr_sas_lsi.c
+++ b/sys/dev/mpr/mpr_sas_lsi.c
@@ -1517,6 +1517,7 @@
 			    /*start*/FALSE,
 			    /*load/eject*/0,
 			    /*immediate*/FALSE,
+			    /*power_condition*/SSS_PC_START_VALID,
 			    MPR_SENSE_LEN,
 			    /*timeout*/10000);
 			xpt_action(ccb);
diff --git a/sys/dev/mps/mps_sas_lsi.c b/sys/dev/mps/mps_sas_lsi.c
--- a/sys/dev/mps/mps_sas_lsi.c
+++ b/sys/dev/mps/mps_sas_lsi.c
@@ -1153,6 +1153,7 @@
 			    /*start*/FALSE,
 			    /*load/eject*/0,
 			    /*immediate*/FALSE,
+			    /*power_condition*/SSS_PC_START_VALID,
 			    MPS_SENSE_LEN,
 			    /*timeout*/10000);
 			xpt_action(ccb);