diff --git a/xymon/plugins/client/ext/smart b/xymon/plugins/client/ext/smart
index b26421b..5eb524a 100755
--- a/xymon/plugins/client/ext/smart
+++ b/xymon/plugins/client/ext/smart
@@ -33,11 +33,13 @@ else {
 
 # fallback to disk detection if nothing defined in the config
 unless (@disks) {
-    opendir(DIR, '/dev') or die $!;
-    while (my $dev = readdir(DIR)) {
-        push(@disks, "/dev/$dev") if ($dev =~ /^[vs]d.*\D$/);
+    ## Put temp_disk_list content to disks array
+    open(my $fh, '<:encoding(UTF-8)', $temp_disk_list)
+        or die "Could not open file '$temp_disk_list' $!";
+    while (my $row = <$fh>) {
+        chomp $row;
+        push(@disks, "$row");
     }
-    closedir(DIR);
 }
 
 my @stat = stat($CACHEFILE);