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System apparatus and method for storage device controller-based message passing having effective data channel bandwidth and controller cache memory increase

  • US 6,792,505 B2
  • Filed: 04/16/2001
  • Issued: 09/14/2004
  • Est. Priority Date: 04/16/2001
  • Status: Expired due to Term
First Claim
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1. A controller device for coupling data between a data storage system including a plurality of disk arrays and a host computer, said controller device comprising:

  • a first prima processor and a first random access memory coupled to said first primary processor;

    a first auxiliary processor including a first memory controller and a first memory coupled to said first memory controller, said first memory controller including a first interface for coupling with a second auxiliary processor including a second memory controller and an associated second memory and a second interface for coupling with said first auxiliary processor, said first memory controller including control logic for treating said first memory and said second memory as a single memory complex;

    at least one communications bus for communication with the plurality of disk arrays coupling said first primary process and said first auxiliary processor; and

    an interconnection channel separate from said communications bus extending between and coupling said first interface of said first memory controller and said second interface of said second memory controller.

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