Pseudo-overwriting data on write-once discs
US8121007B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 9, 2005 |
| Grant date | Feb 21, 2012 |
| Priority date | — |
| Expiry date | Sep 1, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2541
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A file system which is enabled to use a Metadata Partition instead of VAT for write-once discs, is provided by a pseudo-overwrite method. On applying this invention to a drive apparatus which supports pseudo-overwrite media, the file system distinguishes data to overwrite from data to append. 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. When the logical sector is overwritten the data is written to another unrecorded physical sector in the volume space, and remapping information that specifies the original address, and the remapping address are stored in the remapping table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.