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Communicating chunks between devices

  • US 9,665,434 B2
  • Filed: 02/07/2012
  • Issued: 05/30/2017
  • Est. Priority Date: 10/25/2007
  • Status: Active Grant
First Claim
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1. A method of transferring data from a primary data storage medium of a first device to a remote secondary data storage device which is remote from the primary data storage medium, the method comprising:

  • processing, by the first device, the data into chunks;

    issuing, from the first device, a confirmation signal that the data has been copied to the remote secondary data storage device in response to receiving the data and even though at least some of the chunks have not yet been sent to the remote secondary data storage device;

    sending a first chunk identifier from the first device to the remote secondary data storage device, the first chunk identifier being representative of an identity of a first chunk of the data;

    receiving, at the first device, a transfer instruction from the remote secondary data storage device, the transfer instruction responsive to the remote secondary storage device determining that the first chunk identifier does not at least partially match a stored identifier; and

    transferring the first chunk from the primary data storage medium to the remote secondary data storage device in response to the transfer instruction.

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