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Status Not under consideration
Workspace Power Systems Design
Created by Guest
Created on May 11, 2018

RELATED IDEAS

voltage regulator is single point of failure in E850C servers

You can refer to PMR 71797,820,820 (automatically created after call home) and relevant hardware ticket RCMS 01D5MG8,820. I'll focus on E850C (8408-44E) server, but maybe it's also relevant for other Power servers. Server has 4 power supplies and each of them is connected to a voltage regulator. Failure of only one of these 4 regulators causes server to go down, without possibility to power the server on until faulty regulator is replaced. Although there are 4 of them - each one is a single point of failure, which is unacceptable in enterprise-class server.

Idea priority High
  • Guest
    Reply
    |     Oct 2, 2018

    Please analyze RCMS and PMH I've mentioned in this RFE. In our case ONE regulator was faulty and had to be replaced - but server has turned off and we were unable to power it on until this regulator has been replaced.

  • Guest
    Reply
    |     Jul 12, 2018

    We do have redundancy built into the CPU voltage regulators for the E850C. Without going into a lot of detail, the regulators are designed with one additional integrated current engine to allow the system to tolerate one engine failure. For example, one of the DC outputs of the regulator requires 7 current engines to supply all of the current required by the processor. What is actually implemented on the regulator is 8 current engines.

    Not sure what happened with the fail that you mentioned in your request since we do have redundancy already on the regulator. It would require some failure analysis to determine what caused the fail.

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