Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2010-01-06
2010-11-09
Thomas, Shane M (Department: 2186)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C714S005110, C714S042000, C714SE11021
Reexamination Certificate
active
07831767
ABSTRACT:
An object of the present invention is to provide a means for detecting a logical command error, and a storage system and its control method that can properly perform error handling, and detection and blockage of a malfunctioning section. A storage control system includes controller units130A and130B for performing processing for data I/O to/from drives150and160in response to a data I/O request from a host device100, switches140A and140B connecting the controller units130A and130B and the drives150and160, and a port selector300inserted between the switches140A and140B and the drive160. The port selector300, when receiving a command generated based on processing performed by an MPU131, accesses a target drive160if that data that forms a command is valid. Meanwhile, if the port selector300detects logical command inconsistency, the port selector300forwards that detection result to the MPU131via the switch140A or140B and requests retry processing from the MPU131.
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Antonelli, Terry Stout & Kraus, LLP.
Hitachi , Ltd.
Schnee Hal
Thomas Shane M
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