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Automatic disk drive shelf address assignment and error detection method and apparatus

  • US 5,790,782 A
  • Filed: 11/15/1996
  • Issued: 08/04/1998
  • Est. Priority Date: 11/15/1996
  • Status: Expired due to Term
First Claim
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1. Apparatus for automatically providing a different data processing shelf address to each one of a plurality of shelves that are contained in a sequential physical order within a cabinet of a data processing system, said plurality of shelves including a shelf N, a shelf N-1 that is physically located immediately adjacent to shelf N and on a downstream side of shelf N, and a shelf N+1 that is physically located immediately adjacent to shelf N and on an upstream side of shelf N, comprising:

  • a shelf address output-terminal within shelf N-1 electrically connected to a shelf address input-terminal within shelf N by way of a first electrical connection;

    said shelf N-1 output-terminal providing a next-shelf address voltage of a given magnitude to said input-terminal of shelf N;

    magnitude incrementing circuitry within shelf N operable to increase said given magnitude of said next-shelf address voltage to a higher magnitude that comprises an address for shelf N+1, anda shelf address output-terminal within shelf N electrically connected to a shelf address input-terminal within shelf N+1 by way of a second electrical connection;

    said shelf N output-terminal providing said higher magnitude next-shelf shelf address voltage to said input-terminal within shelf N+1.

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