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Error recovery method and apparatus

  • US 4,688,221 A
  • Filed: 12/19/1984
  • Issued: 08/18/1987
  • Est. Priority Date: 12/28/1983
  • Status: Expired due to Term
First Claim
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1. An error recovery apparatus in a data processing system comprising:

  • a peripheral unit for storing data in a plurality of data blocks, each of said data blocks having a unique address;

    a memory for storing a first channel command word (CCW) chain, said memory having storage areas for storing data transferred from said peripheral unit;

    a controller connected between said memory and said peripheral unit for reading said data blocks from said peripheral unit and transferring said data blocks to said memory to store said data blocks in said storage areas determined by said first CCW chain, said controller having detecting means to detect an uncorrectable error in the transfer of the second or subsequent data block of said plurality of data blocks, and;

    processing means connected to said controller for generating a new CCW chain when an uncorrectable error occurs in a second or subsequent data block of said plurality of data blocks.

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