---
 libmultipath/discovery.c |    2 ++
 1 file changed, 2 insertions(+)

Index: multipath-tools/libmultipath/discovery.c
===================================================================
--- multipath-tools.orig/libmultipath/discovery.c
+++ multipath-tools/libmultipath/discovery.c
@@ -297,6 +297,8 @@ sysfs_set_scsi_tmo (struct multipath *mp
 				return 1;
 		}
 		if (mpp->dev_loss){
+			if (mpp->dev_loss > 600 && mpp->fast_io_fail <= 0)
+				condlog(2, "you must enable fast_io_fail_tmo in order to set dev_loss_tmo greater than 600");
 			snprintf(value, 11, "%u", mpp->dev_loss);
  			if (sysfs_attr_set_value(attr_path, "dev_loss_tmo",
 						 value))