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Data record copy system for a disk drive array data storage subsystem

DC
  • US 5,410,667 A
  • Filed: 04/17/1992
  • Issued: 04/25/1995
  • Est. Priority Date: 04/17/1992
  • Status: Expired due to Term
First Claim
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1. A disk memory system for storing data records for at least one data processor comprising:

  • a plurality of disk drives;

    means, responsive to the receipt of a stream of data records from said data processor, for selecting available memory space in said disk drives to store said received stream of data records thereon;

    means for writing said received stream of data records in said selected available memory space;

    means, responsive to said writing means, for generating a data record pointer for each of said data records in said stream of data records identifying the physical memory location of said data record;

    means, responsive to the subsequent receipt of a data record copy request identifying one of said data records stored in said disk drives, for copying said identified data record including;

    means for identifying the physical memory location of the requested data record as specified by its data record pointer,means for generating a data record pointer that is duplicative of said data record pointer as the data record pointer for said copy of said requested data record,means for identifying said duplicative data record pointer as a pointer to a copy of said requested data record, andmeans for maintaining data indicative that both said data record pointer and said duplicative data record pointer point to said requested data record.

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