Tape drive utilizing encoded file markers to locate target positions
US6268975A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 12, 1999 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Mar 12, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/913
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides methods and apparatus for locating target positions within an encoded data stream, where the encoded data stream incorporates special, reserved codewords to represent host data structure information, such as file marks and record boundaries. The encoded data stream can also only be read or decoded in the forwards direction. Incorporation of the special codewords obviates an index associated with the encoded data to support navigation within the encoded data stream. The methods and apparatus locate target positions by decoding the data until the target position is encountered, and provide mechanisms to enable location of target positions that are specified as being backwards, relative to a current position in the encoded data stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.