Quality control in data transfer and storage apparatus
US6877127B2 · kind B2 · utility
1Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2001 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | Jan 21, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1816
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Data from a host computer is buffered, transferred to a logical formatter, compressed and converted to a format suitable for storage on a magnetic tape before being arranged and written sequentially into a main buffer where parity bytes are added as each row of a dataset is written. A physical formatter takes the data sequentially from the main buffer and writes them as codeword quadsets in plural tape tracks. A determination of whether each codeword quadset is acceptably recorded is made by evaluating each codeword quadset for header and codeword quadset pair errors and combining the evaluations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.