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Data block movement offload to storage systems

  • US 9,772,793 B2
  • Filed: 09/18/2014
  • Issued: 09/26/2017
  • Est. Priority Date: 09/20/2013
  • Status: Active Grant
First Claim
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1. A method, comprising steps of:

  • a storage device client writing a data block to a target storage device of a mirrored storage system, wherein writing said data block comprises;

    sending a write request to said target storage device of said mirrored storage system, said write request specifying;

    a source storage device in said mirror storage system,a source primary block address of said data block at said source storage device, anda target primary block address to which to write said data block at said target storage device;

    in response to receiving said write request, said target storage device transmitting a read request for said data block to said source storage device, said read request specifying said source primary block address;

    in response to receiving said read request, said source storage device transmitting said data block to said target storage device;

    said target storage device writing said data block at the target primary block address; and

    after said target storage device writing said data block at the target primary block address, said target storage device transmitting an acknowledgement to said storage device client acknowledging writing said data block at said target storage device.

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