config UDF_FS tristate "UDF file system support" select CRC_ITU_T help This is a file system used on some CD-ROMs and DVDs. Since the file system is supported by multiple operating systems and is more compatible with standard unix file systems, it is also suitable for removable USB disks. Say Y if you intend to mount DVD discs or CDRW's written in packet mode, or if you want to use UDF for removable USB disks. Please read . To compile this file system support as a module, choose M here: the module will be called udf. If unsure, say N. config UDF_NLS bool default y depends on (UDF_FS=m && NLS) || (UDF_FS=y && NLS=y)