All approved UDF 2.60 DCNs

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All approved UDF 2.60 DCNs DCN-5116 Document: OSTA Universal Disk Format Subject: Consequences of Pseudo OverWrite Method Date: October 15, 2004; last modified: December 06, 2004 Editorial change on February 28, 2005 because DCN-5102 was changed. Description: This DCN is meant for the next UDF revision after UDF 2.50 (UDF 2.60). For UDF 2.60, parts of DCN-5101 and DCN-5102 are overruled by this DCN. This DCN describes the changes for the UDF specification as a consequence of the Pseudo-OverWrite Method as described in DCN-5111. The special two partition case with a read-only partition and a pseudo-overwritable partition is not allowed. February 28, 2005: Editorial change, to keep input text for this DCN consistent with changed text of DCN-5102. No consequences for the UDF 2.60 text. The reason for this change is to locate all non-POW changes in DCN-5102, so that these changes are effective for the UDF 2.50 errata. Changes: Add to 1.3.4 Acronyms: POW - Pseudo OverWrite as described in appendix (DCN-5111). NWA - Next Writable Address in a track Add to 1.3.2 Definitions {note: definitions are sorted alphabetically}: Pseudo OverWrite Overwrite performed logically by drive on write-once media using sequential recording. reserved track used track A reserved track is a track that has a valid Next Writable Address (NWA). For Pseudo OverWrite, this means that sequential write at the NWA and pseudo overwrite until the NWA is possible for this track. A used track is a track that does not have a valid Next Writable Address. For Pseudo OverWrite, this means that sequential write to this track is not possible. Pseudo overwrite is still possible. All approved UDF 2.60 DCNs 46 February 28, 2005
All approved UDF 2.60 DCNs Replace the complete section 2.2.14.2 by: (see note below) 2.2.14.2 Uint32 AccessType Besides the values for Access Type as defined in ECMA 3/10.5.7, UDF defines that the value zero shall be used for an Access Type named pseudo-overwritable. This Access Type value shall be used for partitions that support the Pseudo OverWrite Method as described in appendix . A partition with Access Type 3 (rewritable) shall define a Freed Space Bitmap or a Freed Space Table, see 2.3.3. All other partitions shall not define a Freed Space Bitmap or a Freed Space Table. For some rewritable/overwritable media types there may be confusion between partition access types 3 (rewritable) and 4 (overwritable). Rewritable partitions are used on media that require some form of preprocessing before rewriting data (for example legacy MO). Such partitions shall use Access Type 3. Overwritable partitions are used on media that do not require preprocessing before overwriting data (for example: CD-RW, DVD-RW, DVD+RW, DVD-RAM, BD-RE, HD DVD-Rewritable). Such partitions shall use Access Type 4. {note: the addition of DCN-5115 follows here} In 2. Basic Restrictions & Requirements -> Partition descriptor, at the bottom of page 8 replace: A Partition Descriptor Access Type of Read-Only, Rewritable, Overwritable and Write- Once shall be supported. … by: A Partition Descriptor Access Type of read-only, rewritable, overwritable, write-once and pseudo-overwritable shall be supported. … In the first paragraph of 2.2.10 (DCN-5101) replace: A Metadata Partition Map shall be recorded for volumes that contain a single Partition Descriptor having an access type of 1 (read only) or 4 (overwritable) and … by: A Metadata Partition Map shall be recorded for volumes that contain a single Partition Descriptor having an access type of 0 (pseudo-overwritable), 1 (read-only) or 4 (overwritable) and … All approved UDF 2.60 DCNs 47 February 28, 2005
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All approved UDF 2.60 DCNs

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