Secondary storage facility for data processing systems
US3999163A · kind A · utility
50Cited by
9References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1974 |
| Grant date | Dec 21, 1976 |
| Priority date | — |
| Expiry date | Jan 10, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0682
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A secondary storage facility including magnetic tape, disk or drum units or other sequential access storage units. Each storage unit or drive connects to a controller by means of a device bus with asynchronous and synchronous paths. Status and controller information is coupled between the controller and a selected drive unit asynchronously over the asynchronous bus. Actual data transfers occur between the controller and a drive over the synchronous bus and between other units in the system and the controller using direct memory access or equivalent data transfers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.