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Method and apparatus for providing system level errors in a large disk array storage system

  • US 5,935,260 A
  • Filed: 05/02/1997
  • Issued: 08/10/1999
  • Est. Priority Date: 05/02/1997
  • Status: Expired due to Term
First Claim
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1. A storage system comprising:

  • at least one host controller for providing an interface between a host computer and said storage system, said host controller responsive to a first set of commands for performing a corresponding first set of operations;

    a memory accessible by said at least one controller, said memory operable to temporarily store data transferred to and from said host computer and further operable to store error information relevant to said storage system wherein said error information is not accessible to said host computer via said host controller executing any one of said first set of commands;

    a command processor within said host controller for receiving and, depending on which of said commands is received, performing a corresponding one of said first set of operations, said command processor further responsive to receipt of a modified one of said first set of commands for performing an operation which is not one of said first set of operations.

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