paths.php

function listDir($root, $filter=null) {
  $iter = new RecursiveIteratorIterator(
          new RecursiveDirectoryIterator($root, 
          RecursiveDirectoryIterator::SKIP_DOTS),
          RecursiveIteratorIterator::SELF_FIRST,
          RecursiveIteratorIterator::CATCH_GET_CHILD);
  $paths = array();
  foreach ($iter as $path => $fileinfo) {
    if ($filter && is_bool(strpos($path, $filter))) continue;
    if (! $fileinfo->isDir()) $paths[] = $path;
  }
  return $paths;
}

$disks = preg_grep("#wwn-|-part#",listDir("/dev/disk/by-id"), PREG_GREP_INVERT);
foreach ($disks as $disk) {
  $attrs = parse_ini_string(shell_exec("udevadm info --query=property --name=".realpath($disk)." 2>/dev/null 2>/dev/null"));
  $path = dirname(dirname(dirname($attrs['DEVPATH'])));
  $data[$path] = $attrs['ID_SERIAL_SHORT'];
}
natsort($data);
$max = max(array_map('strlen', $data)) + 1;
foreach ($data as $path => $serial) {
  echo str_pad($serial, $max)."<=> {$path}\n";
}