Synchronizing signal switching system for synchronizing external

Details Synchronizing signal switching system for synchronizing external Synchronizing signal switching system for synchronizing external

1990-06-21

1993-06-01

Psitos, Aristotelis

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 58, 371 111, G11B 390, G06F 1100

Patent

active

052166546

ABSTRACT:
Disclosed is a synchronizing signal switching system for synchronizing operations of a plurality of disk devices without stopping the system operation even when a currently used synchronizing signal is stopped or deviated from standard. To this end, each disk device comprises a disk unit and a synchronizing signal switching unit for generating a synchronizing signal to be supplied to the disk unit. One of the disk devices is a current master disk device for currently supplying a master synchronizing signal and another one of the disk devices is a next master disk device. The disk devices are connected in a sequence to form a loop through which the master synchronizing signal is transmitted. The synchronizing signal switching unit in each of the disk devices is provided with an inheritance order to become the current master disk device or the next master disk device. When the current master synchronizing signal is deteriorated, the synchronizing signal switching unit having the next inheritance order is switched to supply the synchronizing signal as the current master synchronizing signal to all of the disk devices through the loop.

REFERENCES:
patent: 3503058 (1967-03-01), Ault et al.
patent: 3893178 (1975-07-01), Sordello
patent: 4870643 (1989-09-01), Buttman et al.
patent: 4907105 (1990-03-01), Kurzweil, Jr.

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