Update elastic-san-connect-linux.md

updating some additional multipath conf settings for Linux

Author: jjrong

articles/storage/elastic-san/elastic-san-connect-linux.md

@@ -50,7 +50,8 @@ defaults {
     path_grouping_policy multibus	# To place all the paths in one priority group
     path_selector "round-robin 0"	# To use round robin algorithm to determine path for next I/O operation
     failback immediate			# For immediate failback to highest priority path group with active paths
-    no_path_retry 1			# To disable I/O queueing after retrying once when all paths are down
+    no_path_retry 3			# To disable I/O queueing after retrying once when all paths are down
+    polling_interval 5         # Set path check polling interval to 5 seconds
 }
 devices {
   device {
@@ -86,4 +87,4 @@ You need to use 32 sessions to each target volume to achieve its maximum IOPS an
 
 ## Next steps
 
-[Configure Elastic SAN networking](elastic-san-networking.md)
+[Configure Elastic SAN networking](elastic-san-networking.md)