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Apparatus and method for deterministically performing active-active failover of redundant servers in a network storage appliance

  • US 20050207105A1
  • Filed: 07/16/2004
  • Published: 09/22/2005
  • Est. Priority Date: 04/23/2003
  • Status: Active Grant
First Claim
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1. A network storage appliance for deterministically performing active-active failover of redundant servers enclosed therein, comprising:

  • redundant servers, each having at least one unique ID for communicating on a network;

    at least one storage controller, coupled to said redundant servers, for transferring data between storage devices and said servers;

    a backplane, wherein said storage controller and servers comprise a plurality of blades for plugging into said backplane; and

    first and second status paths, comprised in said backplane, each for providing a heartbeat from one of the servers to the other server;

    wherein each of said servers is configured to deterministically disable the other server from communicating on said network in response to detecting that said heartbeat of the other server has stopped, and to assume said at least one unique ID of the other server for communicating on said network thereafter.

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