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Documents
=========
Docs on OSTA UDF:
  http://www2.osta.org/osta/html/udf/udf150.pdf
  http://www2.osta.org/osta/html/tech/mr101.pdf
  http://www2.osta.org/osta/html/standard/standard.pdf

Docs on ECMA 167/2 (ISO/IEC 13346):
  ftp://ftp.ecma.ch/ecma-st/e167-pdf.pdf
Note: ECMA 167/1 was the original submission to ISO.
      The ECMA republished it after making the ISO ammendments.

Docs on Unicode:
  ftp://www.unicode.org/Public/unidata/readme.txt
  ftp://www.unicode.org/Public/unidata/unidata.txt
ASCII is a subset of unicode (high byte = 0);

General
=======
Logical block = group of logical sectors (packet)
Logical sector = what the apllication sees
Physical sector = what the device is
First 32K bytes are reserved for the native operating system.
Total sectors = N

Superblock
==========
AVDP = AnchorVolumeDescriptorPointor
2.2.3 at offset 32K [6.10.1 CD-R allows at 64K] (required)
Everything but open CD-R media also one at either N-32K or N.

LVID = LogicalVolumeIntegrityDesc
Lots of vital info here.

struct extent_ad
================
Variable size
 - minimum 8K bytes (2.2.4.5)
 - maximum 1G blocks - logical block size