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Storage system

  • US 20070179994A1
  • Filed: 03/22/2006
  • Published: 08/02/2007
  • Est. Priority Date: 01/31/2006
  • Status: Active Grant
First Claim
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1. A storage system connected to a computer, comprising:

  • a first storage area for storing data to be used by said computer;

    a second storage area for storing write data and first update log information corresponding to said write data when there is a write request from said computer for writing data in said first storage area;

    update data reception means for receiving said write data from said computer and writing this in said first storage area; and

    update log creation means for creating said first update log information;

    wherein said update data reception means detects the situation of not being able to write said write data received from said computer in said first storage area as a status change in said first storage area; and

    wherein said update log creation means defines a point on and after the point in time when said update data reception means detected said status change as a recovery request point, and creates second update log information corresponding to said recovery request point.

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