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Method to validate system configuration in a data storage and retrieval system

  • US 7,567,886 B2
  • Filed: 02/08/2005
  • Issued: 07/28/2009
  • Est. Priority Date: 04/18/2001
  • Status: Expired due to Fees
First Claim
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1. A method to evaluate the performance of input/output devices and interconnecting buses disposed in a data storage and retrieval system, wherein said data storage and retrieval system comprises a host computer comprising a first host bus adapter and a second host bus adapter, first information comprising one or more valid system configurations, and second information comprising an apparent system configuration, said method comprising the steps of:

  • supplying a library external to said host computer, wherein said library comprises a plurality of input/output devices, a plurality of data storage media disposed in a plurality of data storage cartridges which are stored in a plurality of storage slots, and one or more accessors to retrieve, transport, and insert, said plurality of data storage cartridges in said plurality of input/output devices,supplying a first bus connecting said first host bus adapter to each of said plurality of input/output devices;

    supplying a second bus connecting said second host bus adapter to each of said plurality of input/output devices;

    providing third information via said first bus to one of said plurality of input/output devices, wherein said third information comprises a series of connect commands interspersed with a series of disconnect commands, wherein said connect commands are selected from the group consisting of read buffer commands and write buffer commands;

    receiving fourth information via said first bus from said one of said plurality of input/output devices, wherein said fourth information comprises device status information, transmitted data, and bus access requests;

    evaluating-the performance of said first bus;

    comparing the performance of said first bus with nominal performance specifications for said first bus;

    when determining that the performance of said first bus is not acceptable,displaying an error message on said host computer;

    when determining that the performance of said first bus is acceptable, placing said data storage and retrieval system in a ready state.

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