diff --git a/etc/inc/util.inc b/etc/inc/util.inc
index 683061ce2..dd6a81871 100644
--- a/etc/inc/util.inc
+++ b/etc/inc/util.inc
@@ -2075,4 +2075,17 @@ function post_redirect($page, $params) {
 	print "</body></html>\n";
 }
 
+/* Locate disks that can be queried for S.M.A.R.T. data. */
+function get_smart_drive_list() {
+	$disk_list = explode(" ", get_single_sysctl("kern.disks"));
+	foreach ($disk_list as $id => $disk) {
+		// We only want certain kinds of disks for S.M.A.R.T.
+		if (preg_match("/^(ad|da|ada).*[0-9]{1,2}$/", $disk) === FALSE) {
+			unset($disk_list[$id]);
+		}
+	}
+	sort($disk_list);
+	return $disk_list;
+}
+
 ?>
diff --git a/usr/local/www/diag_smart.php b/usr/local/www/diag_smart.php
index 2cbc60bf1..a8bfd3ebb 100644
--- a/usr/local/www/diag_smart.php
+++ b/usr/local/www/diag_smart.php
@@ -276,8 +276,7 @@ switch($action) {
 	// Default page, prints the forms to view info, test, etc...
 	default:
 	{
-		// Get all AD* and DA* (IDE and SCSI) devices currently installed and stores them in the $devs array
-		exec("ls /dev | grep '^\(ad\|da\|ada\)[0-9]\{1,2\}$'", $devs);
+		$devs = get_smart_drive_list();
 		?>
 		<table width="100%" border="0" cellpadding="0" cellspacing="0" summary="default page">
 			<tr>
diff --git a/usr/local/www/widgets/widgets/smart_status.widget.php b/usr/local/www/widgets/widgets/smart_status.widget.php
index 746e78d72..f02c53131 100644
--- a/usr/local/www/widgets/widgets/smart_status.widget.php
+++ b/usr/local/www/widgets/widgets/smart_status.widget.php
@@ -42,7 +42,7 @@ require_once("/usr/local/www/widgets/include/smart_status.inc");
 <?php
 $devs = array();
 ## Get all adX, daX, and adaX (IDE, SCSI, and AHCI) devices currently installed
-exec("ls /dev | grep '^\(ad\|da\|ada\)[0-9]\{1,2\}$'", $devs); ## From SMART status page
+$devs = get_smart_drive_list();
 
 if(count($devs) > 0)  {
 	foreach($devs as $dev)  {	## for each found drive do