// Stat a volume entry.
	var st os.FileInfo
	st, err = Lstat(volumeDir)
	if err != nil {
		switch {
		case osIsNotExist(err):
			return VolInfo{}, errVolumeNotFound
		case osIsPermission(err):
			return VolInfo{}, errDiskAccessDenied
		case isSysErrIO(err):
			return VolInfo{}, errFaultyDisk
		default:
			return VolInfo{}, err
		}
	}
	// As os.Lstat() doesn't carry other than ModTime(), use ModTime()