small update to add workaround text

Author: mlhoop

articles/aks/troubleshooting.md

@@ -489,9 +489,9 @@ E1114 09:58:55.367731 1 static_autoscaler.go:239] Failed to fix node group sizes
 
 This error is due to an upstream cluster autoscaler race condition where the cluster autoscaler ends with a different value than the one that is actually in the cluster. To get out of this state, simply disable and re-enable the [cluster autoscaler][cluster-autoscaler].
 
-### GetAzureDiskLun takes 10 to 15 minutes and you receive an error
+### Slow disk attchment, GetAzureDiskLun takes 10 to 15 minutes and you receive an error
 
-On Kubernetes versions older than 1.15.0 you may receive an error such as **Error WaitForAttach Cannot find Lun for disk**.  
+On Kubernetes versions **older than 1.15.0** you may receive an error such as **Error WaitForAttach Cannot find Lun for disk**.  The workaround for this is to wait approximatly 15 minutes and retry.
 
 <!-- LINKS - internal -->
 [view-master-logs]: view-master-logs.md