diff --git a/scst/include/scst.h b/scst/include/scst.h
index 7a4ca764e..16b92cd60 100644
--- a/scst/include/scst.h
+++ b/scst/include/scst.h
@@ -1354,6 +1354,11 @@ struct scst_dev_type {
 	 */
 	unsigned auto_cm_assignment_possible:1;
 
+	/*
+	 * Set if this handler does not have run time devices management
+	 */
+	unsigned no_mgmt:1;
+
 	/*
 	 * Called to parse CDB from the cmd and initialize
 	 * cmd->bufflen and cmd->data_direction (both - REQUIRED).
diff --git a/scst/include/scst_debug.h b/scst/include/scst_debug.h
index de8f50d7e..9c075c3f0 100644
--- a/scst/include/scst_debug.h
+++ b/scst/include/scst_debug.h
@@ -399,4 +399,13 @@ do {									\
 #define SCST_SLAB_FLAGS 0L
 #endif
 
+#define PRINT_WARNING_ONCE(format, args...)			\
+do {								\
+	static bool __warned;					\
+	if (!__warned) {					\
+		__warned = true;				\
+		PRINT_WARNING(format, ## args);			\
+	}							\
+} while(0)
+
 #endif /* __SCST_DEBUG_H */
diff --git a/scst/src/dev_handlers/scst_user.c b/scst/src/dev_handlers/scst_user.c
index c2dd44aec..7e9962bcf 100644
--- a/scst/src/dev_handlers/scst_user.c
+++ b/scst/src/dev_handlers/scst_user.c
@@ -234,6 +234,7 @@ static const struct file_operations dev_user_fops = {
 };
 
 static struct scst_dev_type dev_user_devtype = {
+	.no_mgmt =	1,
 	.name =		DEV_USER_NAME,
 	.type =		-1,
 	.parse =	dev_usr_parse,
diff --git a/scst/src/dev_handlers/scst_vdisk.c b/scst/src/dev_handlers/scst_vdisk.c
index 16ddb3e03..fcd8cecf4 100644
--- a/scst/src/dev_handlers/scst_vdisk.c
+++ b/scst/src/dev_handlers/scst_vdisk.c
@@ -865,7 +865,7 @@ static struct scst_dev_type vdisk_null_devtype = {
 		"blocksize, "
 		"dif_mode, "
 		"dif_type, "
-		"dif_static_app_tag, ",
+		"dif_static_app_tag, "
 		"dummy, "
 		"numa_node_id, "
 		"cluster_mode, "
@@ -3847,7 +3847,7 @@ static int vdisk_unmap_file_range(struct scst_cmd *cmd,
 	res = fd->f_op->fallocate(fd,
 		FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, off, len);
 	if (unlikely(res != 0)) {
-		PRINT_ERROR("fallocate() for %lld, len %lld "
+		PRINT_WARNING_ONCE("fallocate() for %lld, len %lld "
 			"failed: %d", (unsigned long long)off,
 			(unsigned long long)len, res);
 		scst_set_cmd_error(cmd,
diff --git a/scst/src/scst_sysfs.c b/scst/src/scst_sysfs.c
index 9447b05f7..e1d4ce77f 100644
--- a/scst/src/scst_sysfs.c
+++ b/scst/src/scst_sysfs.c
@@ -903,7 +903,7 @@ static ssize_t scst_tgtt_mgmt_show(struct kobject *kobj,
 		"\n"
 		"where parameters are one or more "
 		"param_name=value pairs separated by ';'\n\n"
-		"%s%s%s%s%s%s%s%s\n";
+		"%s%s%s%s%s%s%s%s%s%s\n";
 	struct scst_tgt_template *tgtt;
 
 	tgtt = container_of(kobj, struct scst_tgt_template, tgtt_kobj);
@@ -916,10 +916,12 @@ static ssize_t scst_tgtt_mgmt_show(struct kobject *kobj,
 			"       echo \"add_target_attribute target_name <attribute> <value>\" >mgmt\n"
 			"       echo \"del_target_attribute target_name <attribute> <value>\" >mgmt\n" : "",
 		(tgtt->mgmt_cmd_help) ? tgtt->mgmt_cmd_help : "",
+		(tgtt->mgmt_cmd_help) ? "\n" : "",
 		(tgtt->add_target_parameters != NULL) ?
 			"The following parameters available: " : "",
 		(tgtt->add_target_parameters != NULL) ?
 			tgtt->add_target_parameters : "",
+		(tgtt->add_target_parameters != NULL) ? "\n" : "",
 		(tgtt->tgtt_optional_attributes != NULL) ?
 			"The following target driver attributes available: " : "",
 		(tgtt->tgtt_optional_attributes != NULL) ?
@@ -5917,7 +5919,7 @@ static ssize_t scst_devt_mgmt_show(struct kobject *kobj,
 		"\n"
 		"where parameters are one or more "
 		"param_name=value pairs separated by ';'\n\n"
-		"%s%s%s%s%s%s%s%s\n";
+		"%s%s%s%s%s%s%s%s%s%s\n";
 	struct scst_dev_type *devt;
 
 	devt = container_of(kobj, struct scst_dev_type, devt_kobj);
@@ -5927,13 +5929,15 @@ static ssize_t scst_devt_mgmt_show(struct kobject *kobj,
 			"       echo \"add_attribute <attribute> <value>\" >mgmt\n"
 			"       echo \"del_attribute <attribute> <value>\" >mgmt\n" : "",
 		(devt->dev_optional_attributes != NULL) ?
-			"       echo \"add_device_attribute device_name <attribute> <value>\" >mgmt"
+			"       echo \"add_device_attribute device_name <attribute> <value>\" >mgmt\n"
 			"       echo \"del_device_attribute device_name <attribute> <value>\" >mgmt\n" : "",
 		(devt->mgmt_cmd_help) ? devt->mgmt_cmd_help : "",
+		(devt->mgmt_cmd_help) ? "\n" : "",
 		(devt->add_device_parameters != NULL) ?
 			"The following parameters available: " : "",
 		(devt->add_device_parameters != NULL) ?
 			devt->add_device_parameters : "",
+		(devt->add_device_parameters != NULL) ? "\n" : "",
 		(devt->devt_optional_attributes != NULL) ?
 			"The following dev handler attributes available: " : "",
 		(devt->devt_optional_attributes != NULL) ?
@@ -6232,7 +6236,7 @@ int scst_devt_sysfs_create(struct scst_dev_type *devt)
 	if (devt->add_device != NULL) {
 		res = sysfs_create_file(&devt->devt_kobj,
 				&scst_devt_mgmt.attr);
-	} else {
+	} else if (!devt->no_mgmt) {
 		res = sysfs_create_file(&devt->devt_kobj,
 				&scst_devt_pass_through_mgmt.attr);
 	}