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Method and system for managing data migration for a storage system

  • US 6,654,830 B1
  • Filed: 12/06/1999
  • Issued: 11/25/2003
  • Est. Priority Date: 03/25/1999
  • Status: Expired due to Term
First Claim
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1. An intermediate device for a storage network, comprising:

  • a plurality of communication interfaces, the plurality of communication interfaces including at least a first interface adapted for communication with a first storage device which stores a data set, a second interface adapted for communication with a second storage device, and a third interface adapted for communication with a client processor;

    data transfer for resources coupled to the plurality of interfaces which transfer data access requests identifying the data set from the third interface to the first interface;

    a logic engine, coupled to the first and second interfaces, which in response to a control signal, manages transfer of the data set through the first interface from the first storage device and through the second interface to the second storage device;

    logic to assign a priority to the transfer in relation to data access requests from the client processor, and to manage the transfer in response to the priority; and

    , data structures which store status information concerning progress of the transfer, including a parameter indicating an extent of the data set which already copied to the second storage device.

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