Method and system for detecting cross linked files
US6874004B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 2002 |
| Grant date | Mar 29, 2005 |
| Priority date | — |
| Expiry date | Apr 29, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99956
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for detecting and correcting cross-linked files while accessing data on a storage media. Each file includes control file information that defines a plurality of blocks on storage media allocated to the file. When a program identifies a volume of storage media that may include cross-linked files, the program intercepts requests to access a file on the storage device. The program then reads the control information for the file and identifies the blocks allocated to the file. The program compares the allocation to a free space map, identifying allocated and unallocated blocks on the storage media, and corrects any inconsistency between the free space map and the control information. The program also maintains a secondary map, which identifies the blocks on the storage media allocated to the files that have been previously been examined. If the program determines, based on the secondary map, a block on the storage media is allocated to at least a first file and a second file, the program modifies the allocation of the first file so that it does not reference a block allocated to the second file. The program is capable of correcting and detecting cross-linked files while the st…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.