Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2005-05-09
2011-12-06
Dinh, Tan X (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C714S006130
Reexamination Certificate
active
08072860
ABSTRACT:
A file system is enabled to use a Metadata Partition instead of VAT for write-once discs, and is provided by a pseudo-overwrite method with a plurality of tracks especially for metadata and file data. On applying this invention to a drive apparatus that supports pseudo-overwrite media, the file system distinguishes data to overwrite from data to append (S1701). When the data is newly written to a logical sector, the drive apparatus writes the data to a physical sector to which the logical sector corresponds (S1703). When the data being overwritten is data stored in the logical sector, the data is written to the other unrecorded physical sector in the volume space (S1704), and remapping information is written (S1705). The remapping information specifies the original address of the physical sector, and the remapping address of the physical sector in which the data is written.
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Takashi Yokozeki et al.; “A Virtual Optical Disk Method to Realize Rewritability and Revision Control on a Write-Once Optical Disk”; Systems & Computers in Japan; Scripta Technica Journals; New York, US; vol. 21, No. 8; Jan. 1990; pp. 34-43, XP000177819.
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Buban Garret J.
Ghotge Vishal V.
Gotoh Yoshiho
Havewala Sarosh C.
Nagar Rajeev Y.
Dinh Tan X
Microsoft Corporation
Panasonic Corporation
Renner , Otto, Boisselle & Sklar, LLP
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