diff --git a/mxraid/mxraid_assemble b/mxraid/mxraid_assemble
index be43a8a..5256d2e 100755
--- a/mxraid/mxraid_assemble
+++ b/mxraid/mxraid_assemble
@@ -712,7 +712,7 @@ exit;
     my @ret;
     my $num = scalar @$dev_list;
     for (my $i=0; $i<$num; $i++) {
-      my ($dk) = $dev_list->[$i] =~ m|([^/]+)$|;
+      my ($dk) = $dev_list->[$i] =~ m|([^/]+)$|; # '/sys/block/sda' -> 'sda'
 
       my $model = sys_fs_get_prop('/sys/block/'.$dk.'/device/model');
       my $sizeb = sys_fs_get_prop('/sys/block/'.$dk.'/size') * 512;