Universal disk format volumes with variable size

Details Universal disk format volumes with variable size Universal disk format volumes with variable size

2005-11-01

2005-11-01

Portka, Gary (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C369S047100, C711S170000

Reexamination Certificate

active

06961812

ABSTRACT:
The present invention provides methods and systems for creating and manipulating universal disk format (UDF) data structures having variable amounts of data. For some embodiments, a UDF data structure is formatted with a freespace bitmap field large enough to represent a first amount of data and an area adjacent the freespace bitmap field reserved to allow the freespace bitmap field to expand to represent a second amount of data greater than the first amount of data. The freespace bitmap field may be expanded to represent the second amount of data by increasing a freespace bitmap size field to represent an expanded freespace bitmap field and initializing the expanded portion of the freespace bitmap size field.

REFERENCES:
patent: 5873118 (1999-02-01), Letwin
patent: 6185575 (2001-02-01), Orcutt
patent: 6715030 (2004-03-01), Vandenbergh et al.
“Universal Disk Format Specification”, Revision 2.01, Mar. 2000, Optical Storage Technology Association, pp. 1, 52, and 98.
“Volume and File Structure for Write-Once and Rewritable Media using Non-Sequential Recording for Information Interchange” Standard ECMA-167 , 3rdEdition, Jun. 1997, pp. 1/4, 4/44, and 4/45.

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