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Maintaining computer system operability

  • US 9,632,884 B2
  • Filed: 05/30/2014
  • Issued: 04/25/2017
  • Est. Priority Date: 06/28/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • in response to a requirement for failover from a first resource to a second resource, testing, by one or more processors, an availability of the second resource, wherein the first and second resources are redundant resources of a network-connected data processing apparatus that is communicatively coupled to at least one host computer;

    in response to a positive determination of the availability of the second resource, initiating, by one or more processors, the failover; and

    in response to a negative determination of the availability of the second resource, providing, by one or more processors, an indication of unavailability, wherein the network-connected data processing apparatus is communicatively coupled to at least one host computer,wherein a first failover is performed from the second resource to the first resource in response to a requirement to take the second resource out of operational service, the method further comprising;

    in response to a requirement for a second failover from a first resource to a second resource, testing the availability of the second resource;

    in response to a positive determination of the availability of the second resource, initiating the second failover; and

    in response to a negative determination of the availability of the second resource, providing an indication of unavailability of the second resource.

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