Interface circuit for dual port disk drive systems

Details Interface circuit for dual port disk drive systems Interface circuit for dual port disk drive systems

1990-06-11

1993-08-10

Lall, Parshotam S.

Boots, shoes, and leggings

3642281, 3642384, 3642418, 3642448, 3642481, 3642323, 364DIG1, 395500, G06F 1200, G06F 1516

Patent

active

052356892

ABSTRACT:
The dual port disk drive interface circuit enables a plurality of dual port disk drives to be interconnected with a plurality of control units in a manner that is transparent to both the dual port disk drives and the control unit. The dual port disk drive interface circuit is interposed between the two channels from n control units and the dual ports of m dual port disk drives to switchably interconnect each control unit with an available dual port disk drive. The interface circuit intercepts the control signals that are generated by both the control units and the dual port disk drives and modifies these control signals to emulate the interconnection of each control unit with a dedicated dual port disk drive. The interface circuit controls the routing of data between the control unit and the available ports on the plurality of dual port disk drives to multiply the number of ports available on the dual port disk drive without modification of the control unit or the dual port disk drive.

REFERENCES:
patent: 4888680 (1989-12-01), Sander et al.
patent: 5072378 (1991-12-01), Manka

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