diff --git a/libmultipath/config.c b/libmultipath/config.c
index 5837dc6..9d3f3e1 100644
--- a/libmultipath/config.c
+++ b/libmultipath/config.c
@@ -343,6 +343,7 @@ merge_hwe (struct hwentry * dst, struct hwentry * src)
 	merge_num(user_friendly_names);
 	merge_num(retain_hwhandler);
 	merge_num(detect_prio);
+	merge_num(detect_checker);
 	merge_num(deferred_remove);
 	merge_num(delay_watch_checks);
 	merge_num(delay_wait_checks);
@@ -423,6 +424,7 @@ store_hwe (vector hwtable, struct hwentry * dhwe)
 	hwe->user_friendly_names = dhwe->user_friendly_names;
 	hwe->retain_hwhandler = dhwe->retain_hwhandler;
 	hwe->detect_prio = dhwe->detect_prio;
+	hwe->detect_checker = dhwe->detect_checker;
 
 	if (dhwe->bl_product && !(hwe->bl_product = set_param_str(dhwe->bl_product)))
 		goto out;
@@ -610,6 +612,7 @@ load_config (char * file)
 	conf->fast_io_fail = DEFAULT_FAST_IO_FAIL;
 	conf->retain_hwhandler = DEFAULT_RETAIN_HWHANDLER;
 	conf->detect_prio = DEFAULT_DETECT_PRIO;
+	conf->detect_checker = DEFAULT_DETECT_CHECKER;
 	conf->force_sync = DEFAULT_FORCE_SYNC;
 	conf->partition_delim = DEFAULT_PARTITION_DELIM;
 	conf->processed_main_config = 0;
diff --git a/libmultipath/config.h b/libmultipath/config.h
index 9e47894..9a90745 100644
--- a/libmultipath/config.h
+++ b/libmultipath/config.h
@@ -62,6 +62,7 @@ struct hwentry {
 	int user_friendly_names;
 	int retain_hwhandler;
 	int detect_prio;
+	int detect_checker;
 	int deferred_remove;
 	int delay_watch_checks;
 	int delay_wait_checks;
@@ -139,6 +140,7 @@ struct config {
 	int reassign_maps;
 	int retain_hwhandler;
 	int detect_prio;
+	int detect_checker;
 	int force_sync;
 	int deferred_remove;
 	int processed_main_config;
diff --git a/libmultipath/defaults.h b/libmultipath/defaults.h
index 3ef1579..db2b756 100644
--- a/libmultipath/defaults.h
+++ b/libmultipath/defaults.h
@@ -22,6 +22,7 @@
 #define DEFAULT_DEV_LOSS_TMO	600
 #define DEFAULT_RETAIN_HWHANDLER RETAIN_HWHANDLER_ON
 #define DEFAULT_DETECT_PRIO	DETECT_PRIO_ON
+#define DEFAULT_DETECT_CHECKER	DETECT_CHECKER_ON
 #define DEFAULT_DEFERRED_REMOVE	DEFERRED_REMOVE_OFF
 #define DEFAULT_DELAY_CHECKS	NU_NO
 #define DEFAULT_ERR_CHECKS	NU_NO
diff --git a/libmultipath/dict.c b/libmultipath/dict.c
index 3521c78..bababdb 100644
--- a/libmultipath/dict.c
+++ b/libmultipath/dict.c
@@ -379,6 +379,13 @@ declare_ovr_snprint(detect_prio, print_yes_no_undef)
 declare_hw_handler(detect_prio, set_yes_no_undef)
 declare_hw_snprint(detect_prio, print_yes_no_undef)
 
+declare_def_handler(detect_checker, set_yes_no_undef)
+declare_def_snprint_defint(detect_checker, print_yes_no_undef, YNU_NO)
+declare_ovr_handler(detect_checker, set_yes_no_undef)
+declare_ovr_snprint(detect_checker, print_yes_no_undef)
+declare_hw_handler(detect_checker, set_yes_no_undef)
+declare_hw_snprint(detect_checker, print_yes_no_undef)
+
 declare_def_handler(force_sync, set_yes_no)
 declare_def_snprint(force_sync, print_yes_no)
 
@@ -1419,6 +1426,7 @@ init_keywords(vector keywords)
 	install_keyword("reservation_key", &def_reservation_key_handler, &snprint_def_reservation_key);
 	install_keyword("retain_attached_hw_handler", &def_retain_hwhandler_handler, &snprint_def_retain_hwhandler);
 	install_keyword("detect_prio", &def_detect_prio_handler, &snprint_def_detect_prio);
+	install_keyword("detect_checker", &def_detect_checker_handler, &snprint_def_detect_checker);
 	install_keyword("force_sync", &def_force_sync_handler, &snprint_def_force_sync);
 	install_keyword("strict_timing", &def_strict_timing_handler, &snprint_def_strict_timing);
 	install_keyword("deferred_remove", &def_deferred_remove_handler, &snprint_def_deferred_remove);
@@ -1509,6 +1517,7 @@ init_keywords(vector keywords)
 	install_keyword("user_friendly_names", &hw_user_friendly_names_handler, &snprint_hw_user_friendly_names);
 	install_keyword("retain_attached_hw_handler", &hw_retain_hwhandler_handler, &snprint_hw_retain_hwhandler);
 	install_keyword("detect_prio", &hw_detect_prio_handler, &snprint_hw_detect_prio);
+	install_keyword("detect_checker", &hw_detect_checker_handler, &snprint_hw_detect_checker);
 	install_keyword("deferred_remove", &hw_deferred_remove_handler, &snprint_hw_deferred_remove);
 	install_keyword("delay_watch_checks", &hw_delay_watch_checks_handler, &snprint_hw_delay_watch_checks);
 	install_keyword("delay_wait_checks", &hw_delay_wait_checks_handler, &snprint_hw_delay_wait_checks);
@@ -1541,6 +1550,7 @@ init_keywords(vector keywords)
 	install_keyword("user_friendly_names", &ovr_user_friendly_names_handler, &snprint_ovr_user_friendly_names);
 	install_keyword("retain_attached_hw_handler", &ovr_retain_hwhandler_handler, &snprint_ovr_retain_hwhandler);
 	install_keyword("detect_prio", &ovr_detect_prio_handler, &snprint_ovr_detect_prio);
+	install_keyword("detect_checker", &ovr_detect_checker_handler, &snprint_ovr_detect_checker);
 	install_keyword("deferred_remove", &ovr_deferred_remove_handler, &snprint_ovr_deferred_remove);
 	install_keyword("delay_watch_checks", &ovr_delay_watch_checks_handler, &snprint_ovr_delay_watch_checks);
 	install_keyword("delay_wait_checks", &ovr_delay_wait_checks_handler, &snprint_ovr_delay_wait_checks);
diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
index 39dd92a..4e99845 100644
--- a/libmultipath/discovery.c
+++ b/libmultipath/discovery.c
@@ -30,6 +30,7 @@
 #include "discovery.h"
 #include "prio.h"
 #include "defaults.h"
+#include "prioritizers/alua_rtpg.h"
 
 int
 alloc_path_with_pathinfo (struct config *conf, struct udev_device *udevice,
@@ -829,6 +830,25 @@ get_serial (char * str, int maxlen, int fd)
 	return 1;
 }
 
+static void
+detect_alua(struct path * pp, struct config *conf)
+{
+	int ret;
+	int tpgs;
+	unsigned int timeout = conf->checker_timeout;
+
+	if ((tpgs = get_target_port_group_support(pp->fd, timeout)) <= 0) {
+		pp->tpgs = TPGS_NONE;
+		return;
+	}
+	ret = get_target_port_group(pp, timeout);
+	if (ret < 0 || get_asymmetric_access_state(pp->fd, ret, timeout) < 0) {
+		pp->tpgs = TPGS_NONE;
+		return;
+	}
+	pp->tpgs = tpgs;
+}
+
 #define DEFAULT_SGIO_LEN 254
 
 static int
@@ -1460,11 +1480,14 @@ sysfs_pathinfo(struct path * pp, vector hwtable)
 }
 
 static int
-scsi_ioctl_pathinfo (struct path * pp, int mask)
+scsi_ioctl_pathinfo (struct path * pp, struct config *conf, int mask)
 {
 	struct udev_device *parent;
 	const char *attr_path = NULL;
 
+	if (pp->tpgs == TPGS_UNDEF)
+		detect_alua(pp, conf);
+
 	if (!(mask & DI_SERIAL))
 		return 0;
 
@@ -1524,6 +1547,7 @@ get_state (struct path * pp, struct config *conf, int daemon)
 				return PATH_UNCHECKED;
 			}
 		}
+		select_detect_checker(conf, pp);
 		select_checker(conf, pp);
 		if (!checker_selected(c)) {
 			condlog(3, "%s: No checker selected", pp->dev);
@@ -1832,7 +1856,7 @@ int pathinfo(struct path *pp, struct config *conf, int mask)
 		get_geometry(pp);
 
 	if (path_state == PATH_UP && pp->bus == SYSFS_BUS_SCSI &&
-	    scsi_ioctl_pathinfo(pp, mask))
+	    scsi_ioctl_pathinfo(pp, conf, mask))
 		goto blank;
 
 	if (pp->bus == SYSFS_BUS_CCISS &&
diff --git a/libmultipath/hwtable.c b/libmultipath/hwtable.c
index 8409261..c944015 100644
--- a/libmultipath/hwtable.c
+++ b/libmultipath/hwtable.c
@@ -1122,6 +1122,7 @@ static struct hwentry default_hw[] = {
 		.dev_loss      = 600,
 		.retain_hwhandler = RETAIN_HWHANDLER_ON,
 		.detect_prio   = DETECT_PRIO_ON,
+		.detect_checker = DETECT_CHECKER_ON,
 		.deferred_remove = DEFERRED_REMOVE_OFF,
 		.delay_watch_checks = DELAY_CHECKS_OFF,
 		.delay_wait_checks = DELAY_CHECKS_OFF,
diff --git a/libmultipath/prioritizers/alua_spc3.h b/libmultipath/prioritizers/alua_spc3.h
index 4d4969b..13a0924 100644
--- a/libmultipath/prioritizers/alua_spc3.h
+++ b/libmultipath/prioritizers/alua_spc3.h
@@ -109,6 +109,7 @@ inquiry_command_set_evpd(struct inquiry_command *ic)
 #define VERSION_SPC3					0x05
 
 /* Defined TPGS field values. */
+#define TPGS_UNDEF					 -1
 #define TPGS_NONE					0x0
 #define TPGS_IMPLICIT					0x1
 #define TPGS_EXPLICIT					0x2
diff --git a/libmultipath/propsel.c b/libmultipath/propsel.c
index 1b27476..bba8194 100644
--- a/libmultipath/propsel.c
+++ b/libmultipath/propsel.c
@@ -312,6 +312,11 @@ int select_checker(struct config *conf, struct path *pp)
 	char *origin, *checker_name;
 	struct checker * c = &pp->checker;
 
+	if (pp->detect_checker == DETECT_CHECKER_ON && pp->tpgs > 0) {
+		checker_name = TUR;
+		origin = "(setting: array autodetected)";
+		goto out;
+	}
 	do_set(checker_name, conf->overrides, checker_name, "(setting: multipath.conf overrides section)");
 	do_set(checker_name, pp->hwe, checker_name, "(setting: array configuration)");
 	do_set(checker_name, conf, checker_name, "(setting: multipath.conf defaults/devices section)");
@@ -359,20 +364,11 @@ out:
 void
 detect_prio(struct config *conf, struct path * pp)
 {
-	int ret;
 	struct prio *p = &pp->prio;
-	int tpgs = 0;
-	unsigned int timeout = conf->checker_timeout;
 	char buff[512];
 	char *default_prio = PRIO_ALUA;
 
-	if ((tpgs = get_target_port_group_support(pp->fd, timeout)) <= 0)
-		return;
-	pp->tpgs = tpgs;
-	ret = get_target_port_group(pp, timeout);
-	if (ret < 0)
-		return;
-	if (get_asymmetric_access_state(pp->fd, ret, timeout) < 0)
+	if (pp->tpgs <= 0)
 		return;
 	if (sysfs_get_asymmetric_access_state(pp, buff, 512) >= 0)
 		default_prio = PRIO_SYSFS;
@@ -588,6 +584,21 @@ out:
 	return 0;
 }
 
+int select_detect_checker(struct config *conf, struct path *pp)
+{
+	char *origin;
+
+	pp_set_ovr(detect_checker);
+	pp_set_hwe(detect_checker);
+	pp_set_conf(detect_checker);
+	pp_set_default(detect_checker, DEFAULT_DETECT_CHECKER);
+out:
+	condlog(3, "%s: detect_checker = %s %s", pp->dev,
+		(pp->detect_checker == DETECT_CHECKER_ON)? "yes" : "no",
+		origin);
+	return 0;
+}
+
 int select_deferred_remove(struct config *conf, struct multipath *mp)
 {
 	char *origin;
diff --git a/libmultipath/propsel.h b/libmultipath/propsel.h
index e5b6f93..58a32f3 100644
--- a/libmultipath/propsel.h
+++ b/libmultipath/propsel.h
@@ -19,6 +19,7 @@ int select_dev_loss(struct config *conf, struct multipath *mp);
 int select_reservation_key(struct config *conf, struct multipath *mp);
 int select_retain_hwhandler (struct config *conf, struct multipath * mp);
 int select_detect_prio(struct config *conf, struct path * pp);
+int select_detect_checker(struct config *conf, struct path * pp);
 int select_deferred_remove(struct config *conf, struct multipath *mp);
 int select_delay_watch_checks (struct config *conf, struct multipath * mp);
 int select_delay_wait_checks (struct config *conf, struct multipath * mp);
diff --git a/libmultipath/structs.c b/libmultipath/structs.c
index ba9edf9..f36a055 100644
--- a/libmultipath/structs.c
+++ b/libmultipath/structs.c
@@ -17,6 +17,7 @@
 #include "structs_vec.h"
 #include "blacklist.h"
 #include "prio.h"
+#include "prioritizers/alua_spc3.h"
 
 struct adapter_group *
 alloc_adaptergroup(void)
@@ -96,6 +97,7 @@ alloc_path (void)
 		pp->sg_id.lun = -1;
 		pp->sg_id.proto_id = SCSI_PROTOCOL_UNSPEC;
 		pp->fd = -1;
+		pp->tpgs = TPGS_UNDEF;
 		pp->priority = PRIO_UNDEF;
 	}
 	return pp;
diff --git a/libmultipath/structs.h b/libmultipath/structs.h
index dfd65ae..fdcfc85 100644
--- a/libmultipath/structs.h
+++ b/libmultipath/structs.h
@@ -122,6 +122,12 @@ enum detect_prio_states {
 	DETECT_PRIO_ON = YNU_YES,
 };
 
+enum detect_checker_states {
+	DETECT_CHECKER_UNDEF = YNU_UNDEF,
+	DETECT_CHECKER_OFF = YNU_NO,
+	DETECT_CHECKER_ON = YNU_YES,
+};
+
 enum deferred_remove_states {
 	DEFERRED_REMOVE_UNDEF = YNU_UNDEF,
 	DEFERRED_REMOVE_OFF = YNU_NO,
@@ -211,6 +217,7 @@ struct path {
 	int priority;
 	int pgindex;
 	int detect_prio;
+	int detect_checker;
 	int watch_checks;
 	int wait_checks;
 	int tpgs;
diff --git a/multipath/multipath.conf.5 b/multipath/multipath.conf.5
index 179013c..b08bda3 100644
--- a/multipath/multipath.conf.5
+++ b/multipath/multipath.conf.5
@@ -681,6 +681,20 @@ The default is: \fByes\fR
 .
 .
 .TP
+.B detect_checker
+if set to
+.I yes
+, multipath will try to detect if the device supports SCSI-3 ALUA. If so, the
+device will automatically use the \fItur\fR checker. If set to
+.I no
+, the checker will be selected as usual.
+.RS
+.TP
+The default is: \fByes\fR
+.RE
+.
+.
+.TP
 .B force_sync
 If set to
 .I yes
@@ -1169,6 +1183,8 @@ section:
 .TP
 .B detect_prio
 .TP
+.B detect_checker
+.TP
 .B deferred_remove
 .TP
 .B san_path_err_threshold
@@ -1239,6 +1255,8 @@ the values are taken from the \fIdevices\fR or \fIdefaults\fR sections:
 .TP
 .B detect_prio
 .TP
+.B detect_checker
+.TP
 .B deferred_remove
 .TP
 .B san_path_err_threshold
