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Computer recovery backup method

  • US 5,799,147 A
  • Filed: 06/28/1996
  • Issued: 08/25/1998
  • Est. Priority Date: 10/19/1994
  • Status: Expired due to Fees
First Claim
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1. A computer file data backup method which comprises:

  • a) providing at least one client computer having a client disk image composed of a plurality of client data files, having a set of selected attributes, on a client computer storage means;

    b) providing by the client computer a client disk map composed of the attributes of the client data files;

    c) providing a separate server computer adapted to be connected periodically to said client computer and having server computer storage means only to receive, and to store said client disk image as a client logical disk image;

    d) transmitting from said client computer by a client said client disk image in logical form into said server computer storage means to provide a stored client logical disk image;

    e) updating periodically by the client in said client computer said client disk map by comparing said client disk map with the previous client disk map to identify any client data file with additions, modifications or deletions occurring since the last update of the previous client disk map to provide a revised client disk map;

    f) transmitting from the client computer and only receiving and storing in said storage means of said server computer, the added or modified client data files and removing said deleted client data files to provide a revised updated client logical disk image;

    g) acknowledging between said server computer and client computer the completing of the transmission;

    h) storing in said server computer said revised updated client logical disk image; and

    i) disconnecting the transmission link between said server computer and said client computer until the next client-initiated updating of said revised updated client logical disk image.

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