FS:    support extended attributes (in their own blocks/udf 2.0 streams)    do delayed block assignments    make sure reading works on big endian and/or 64 bit machines    make sure block allocation failures (full disc) cannot mess up extents    make any changes to support UDF 2.01    handling bad block remapping (superblock data/metadata/data)    handling writing VAT/sequential write media (CDR)    add journaling support (?)    WORM supportSUPPORT:    rewrite mkudf (or at least, rework it)    write a udffsck