Read request selection system for redundant storage
US4187538A · kind A · utility
21Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1977 |
| Grant date | Feb 5, 1980 |
| Priority date | — |
| Expiry date | Jun 13, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
There is provided, in accordance with the present invention, apparatus comprising a shared random access memory in which is stored requests for access to data in a bulk memory unit. The data being stored in redundant storage areas and the requests stored in the RAM include the address of the redundant data. Means are provided for determining if that data request is already in progress through one of the redundant addresses. The first of the addresses accessed causes the others to be blocked to prevent multiple accessing of the same data. The checking and selection is accomplished by high speed logic circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.