Method and apparatus for accessing peripheral storages with asychronized individual requests to a host processor
US5235683A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 7, 1989 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Jul 7, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/86
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus for duplicating data, especially in the form of multiple magnetic disks and tapes, includes a host processor (1) which functions as a data source and a plurality of peripheral storage devices (21 . . . 2n) which function as data receivers, connected to one another via a data bus and a control bus. In order to be able to transmit the data information in parallel, the storage devices are synchronized by means of a signal sequence comprising individual request signals (for example dREQ) from all of the storage devices, and acknowledgement signals (for example ACK) from the host processor, executed on a byte-by-byte basis, such that the slowest of the active storage devices determines the execution speed. The host processor can activate or de-activate all or only individual storage devices at any time in any arbitrary sub-combination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.