Control system for magnetic disc storage device
US3990055A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1974 |
| Grant date | Nov 2, 1976 |
| Priority date | — |
| Expiry date | Sep 6, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/36
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An improved control system for a plurality of magnetic disc storage devices which connects one of said devices to a central processing unit for the transmission of data records to or from the central processing unit. The improvement comprises a unit logic controller connected to each disc storage device for receiving and storing priority control information and sector address information associated with a seek operation for a data record address. The unit logic controllers raise an alert signal when the data record address being sought is near the read-write head. The disc storage device having the highest priority associated with its alert signal is connected to the central processing unit for the transfer of data records by the control system. The improved control system requires that the central processing unit be connected to the disc storage device and the unit logic controller for the minimum amount of time during the process of locating a desired data record.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.