Method and apparatus for transferring data between a data bus and a data storage device
US5182752A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1990 |
| Grant date | Jan 26, 1993 |
| Priority date | — |
| Expiry date | Jun 29, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1004
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A bus interface between a data bus and data-storage devices provides error protection for multi-byte data packets received from the bus and intended for storage on an associated storage device by checking a packet for errors using check sum symbols and parity bits in the packet. The bus interface then (i) encodes a predetermined number of data symbols to generate error detection symbols, (ii) again checks the data symbols for errors using the parity bits, and (iii) stores the data and associated error detection symbols in one of the series of linked buffers. Each buffer holds enough to fill one storage unit, or sector. A storage interface later retrieves the buffered data and error detection symbols, combines them with the address of a designated storage sector, and encodes the symbols to generate error correction symbols. It then stores the encoded data, and error detection and correction symbols in the designated sector. When the storage interface later retrieves the symbols from the sector, it corrects errors in the data using the retrieved error correction symbols. It next removes the sector address from the error detection symbols and returns the data and error detection symbo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.