diff --git a/storage/emc/xtremio/restapi/mode/clusterhealth.pm b/storage/emc/xtremio/restapi/mode/clusterhealth.pm
index 0e349e8c1..25ac27600 100644
--- a/storage/emc/xtremio/restapi/mode/clusterhealth.pm
+++ b/storage/emc/xtremio/restapi/mode/clusterhealth.pm
@@ -131,6 +131,7 @@ sub run {
                                             name => $item);
 
         foreach my $sensor (@sensors) {
+            next if (!defined($details->{$sensor}) || $details->{$sensor} eq '');
             $self->{output}->output_add(long_msg => sprintf("Sensor '%s' state is '%s'",
                                                             $sensor, $details->{$sensor}));
                                                             
diff --git a/storage/emc/xtremio/restapi/mode/ssdiops.pm b/storage/emc/xtremio/restapi/mode/ssdiops.pm
index 8edd9e6f7..046e74c6d 100644
--- a/storage/emc/xtremio/restapi/mode/ssdiops.pm
+++ b/storage/emc/xtremio/restapi/mode/ssdiops.pm
@@ -200,17 +200,16 @@ Check IOPS (Global, Read, Write) on each SSDs.
 
 =item B<--warning-*>
 
-Threshold warning.
-Can be: 'global' (%), 'read' (%), 'write' (%).
+Threshold warning (number of iops)
+Can be: 'global', 'read', 'write'.
 
 =item B<--critical-*>
-
-Threshold critical.
-Can be: 'global' (%), 'read' (%), 'write' (%).
+Threshold critical (number of iops)
+Can be: 'global', 'read', 'write'.
 
 =item B<--filter-name>
 
-Filter SSD name (can be a regexp).
+Filter SSD name (can be a regexp). (e.g --filter-name '.*' for all SSDs)
 
 =back