Rob McNelly

Rob McNelly

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Recent Posts

  • On Becoming a Sponsor User
  • A Tip on Getting Started with the PowerHA 7.2.1 GUI
  • Just Back from Technical University
  • Patching: Seeking a Happy Medium
  • A Hitch with SEA Failover Testing
  • Single-User Mode vs. Maintenance Mode

    Recently I was telling a customer about the differences between booting into single-user mode and booting into maintenance mode. If you're not familiar with these procedures, I recommend either using an existing LPAR or creating a new LPAR and trying them both. But before you do that, check out two valuable IBM support technotes (FAQs) that walk through each method.

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    Posted: February 09, 2016 |

    New Solutions to the Age-Old Problem of Memory Errors

    This article made the rounds on Twitter awhile ago. It's worth your time if you haven't read it:

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    Posted: February 02, 2016 |

    Thoughts on SAP HANA's Availability on Power Systems

    I assume you've heard by now that SAP HANA is available on IBM Power Systems.

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    Posted: January 26, 2016 |

    Another HMC Goody: myHMC Mobile

    After trying out the HMC virtual appliance (vHMC), I wanted to examine the myHMC mobile application. The app, which came out last summer, is designed to allow you to manage HMC devices from your phone.

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    Posted: January 19, 2016 |

    Testing Out the New vHMC

    Have you ever wished you could run HMC code on your laptop? Sure, there are unsupported work-arounds, but the new HMC virtual appliance (vHMC) makes this task much simpler to accomplish, and it's supported by IBM. Read all about it in section 3.2 of this Redbook.

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    Posted: January 12, 2016 |

    Simon Scripts

    For years I've been asking you to send me scripts. Sharing your scripting abilities benefits us all. We can use them as is, or as a starting point to create scripts that could help others.

    Sometime I find scripts; regardless of their origin, I share them when I get permission from their authors. It's a win-win.

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    Posted: January 05, 2016 |

    The Important Work of Certification Test Writing

    I've once again been working with teams that are updating various certification tests. I enjoy the interaction with tech pros from around the world as we devise test questions and answers.

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    Posted: December 22, 2015 |

    Calculating Hypervisor Memory Overhead

    A customer recently contacted IBM Support, wondering how much memory the hypervisor could be expected to consume in their real world environment. Even given how inexpensive memory has become and how convenient it is to add and modify partitions as needed, customers can benefit by planning for their expected workloads as well as their hypervisor and VIO server memory overhead.

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    Posted: December 15, 2015 |

    The Costs of Technical Debt

    As often as I see it, it still surprises me when I encounter a company that depends on some application, but chooses to run it on unsupported hardware without maintenance agreements and/or vendor support. If anything goes sideways, who knows how they will stay in business.

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    Posted: December 08, 2015 |

    Moving an AIX System

    If you're tasked with migrating, duplicating or cloning your system from old to new hardware, how do you go about it?

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    Posted: December 01, 2015 |

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