G - Physics – 06 – F
Patent
G - Physics
06
F
352/21
G06F 3/06 (2006.01) G11B 5/09 (2006.01)
Patent
CA 1220269
ABSTRACT A digital data bus system for connecting a controller and a disk drive. Data on the disk is stored in track sectors containing a header and data. The controller includes a high-speed processor which performs a header compare opera- tion comparing the values received from a header with the expected contents of the header and operations which deter- mine when all of the data in a track sector has been transferred. The digital data bus system includes a bus for transferring data between the controller and the disk drive and a header-data mode bus for providing a header mode signal and a data mode signal from the controller to the disk drive. During an operation transferring data between the controller and the disk, the disk drive responds to the header mode signal by transferring a header to the controller. If the header compare operation indicates that the header is valid, the controller provides the data mode signal and the disk drive responds by transferring data to or from the track sector as required for the operation. When the controller determines that all of the data has been transferred, it again provides the header mode signal to the disk drive and the disk drive responds as just described. -1-
453874
Braun William A.
Caldara Stephen A.
Faletra Salvatore
Gershenson Edward
Lemone Louis A.
Data General Corporation
Macrae & Co.
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