Methods and apparatus for resetting peripheral devices addressable as a plurality of logical devices
US4403288A · kind A · utility
37Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1981 |
| Grant date | Sep 6, 1983 |
| Priority date | — |
| Expiry date | Sep 28, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0866
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Direct access storage devices (DASD) are connected to a host via a cache. Each device can be independently addressed by any one of a plurality of addresses, also termed logical devices and exposures. Since operations between DASD and cache are combined for all of the independent logical devices, resetting operations related to one independent logical device can inadvertently interfere with operations of another independent logical device. To maintain data integrity, a programmed control accommodates logical device independence by using queues and control blocks relating to the DASD and logical devices, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.