diff --git a/check_lsi_raid b/check_lsi_raid
index abc2f54..2cc1899 100755
--- a/check_lsi_raid
+++ b/check_lsi_raid
@@ -481,7 +481,7 @@ sub getPhysicalDevices{
 
 	my @output = `$command`;
 	my @foundDevs;
-	if(checkCommandStatus(\@output)) {
+	if(checkCommandStatus(\@output)){
 		if($action eq "all") {
 			my $currBlock;
 			my $line_ref;
@@ -555,6 +555,10 @@ sub getPhysicalDevices{
 			}
 		}
 	}
+	else {
+		print "Invalid StorCLI command! ($command)\n";
+		exit(STATE_UNKNOWN);
+	}
 	return \@foundDevs;
 }