System for recovering data stored in failed memory unit
US4092732A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 31, 1977 |
| Grant date | May 30, 1978 |
| Priority date | — |
| Expiry date | May 31, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1076
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A storage subsystem comprising a storage control unit and a number of failure independent storage devices, such as disk files, is provided with a check sum generator for generating a check sum segment from segments of a system record as the system record segments are being transferred between the storage subsystem and a CPU of a data processing system. The check sum segments and the associated system record segments are stored on different units so that if one unit containing a system record segment becomes unavailable, the unavailable segment is reconstructed during transfer of the other available segments and the check sum segment to the CPU.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.