Write pass identifier
US6282040A · kind A · utility
16Cited by
4References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 12, 1999 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Feb 12, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of encoding data to distinguish between new data and incompletely erased old data when restoring the data from a magnetic tape storage device comprises: arranging a byte stream of user data into a plurality of track blocks; adding to each track block a track block header containing a write pass identifier; as the data are written to tape, the write pass identifier of the data already on tape is read and the write pass identifier of the data being written to tape is incremented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.