All approved UDF 2.60 DCNs

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