Electronic apparatus including plural processors

Electrical computers and digital data processing systems: input/ – Input/output data processing – Input/output access regulation

Reexamination Certificate

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Reexamination Certificate

active

10958597

ABSTRACT:
An electronic apparatus includes first and second processors which execute first and second operating systems, first disk controller which accesses a disk storage device in response to a disk access request from the first processor, a second disk controller which accesses the disk storage device in response to a disk access request from the second processor, a switch device to connect one of the first and second disk controllers to the disk storage device, and a unit for switching an access path, which is used when the first processor accesses the disk storage device, between a first access pass in which the first processor executes access to the disk storage device via the second processor, and a second access pass in which the first processor executes access to the disk storage device without intervention of the second processor.

REFERENCES:
patent: 5237670 (1993-08-01), Wakerly
patent: 2005/0080975 (2005-04-01), Elledge et al.
patent: 5-216802 (1993-08-01), None
patent: 11-250569 (1999-09-01), None

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