Methods and apparatus for multiple point in time data access

  • US 7,849,361 B2
  • Filed: 12/12/2006
  • Issued: 12/07/2010
  • Est. Priority Date: 12/22/2005
  • Status: Active Grant
First Claim
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1. A method for providing access to data, comprising:

  • for a host device within a host computer, the host device corresponding to a first logical storage unit configured to access data directly from a physical storage system, assigning a second logical storage unit configured to access the storage system indirectly via a data protection computer;

    providing the data protection computer access to a data structure that is able to recover data that was stored in the storage system at an earlier point in time; and

    in response to a request from the host computer for data that was stored in the storage system at the earlier point in time, switching the host device to get its data from the second logical storage unit instead of from the first logical storage unit.

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