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System and method for data recovery in multiple head assembly storage devices

  • US 5,163,162 A
  • Filed: 11/14/1990
  • Issued: 11/10/1992
  • Est. Priority Date: 11/14/1990
  • Status: Expired due to Fees
First Claim
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1. A system for aligning a misaligned head in a multiple head storage device having two or more heads capable of simultaneously reading data, comprising:

  • data buffer means for storing a block of interleaved data read from the multiple head storage device;

    status bits for indicating which, if any, of the two or more heads is the misaligned head;

    error detection means for determining from the block of interleaved data which if any of the two or more heads from the multiple head storage device is the misaligned head and for setting said status bits;

    data recovery control logic means, responsive to said status bits, for sending control signals to the multiple head storage device, and for causing the misaligned head to move its position by small increments and to read data until said status bits indicate that the misaligned head has become an aligned head; and

    interleaving means, responsive to said status bits, for interleaving data read from the aligned head with said block of interleaved data in said data buffer means, such that any data stored in said data buffer means read from the misaligned head is overwritten by the data read from said aligned head.

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