Rob McNelly

Rob McNelly

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Recent Posts

  • Supporting Systems and the People Who Use Them
  • New Servers Designed for Smaller Environments
  • Article Misses the Point on VIOS Use
  • Decoding iCalendar Files
  • Taking on the Upgrade Exception
  • When Rebooting, Don't Forget About the System Profile

    Recently a customer rebooted some systems that hadn't been restarted in more than a year. All of the LPARs and the VIO servers were powered off so maintenance could be performed. The customer was able to use live partition mobility to relocate the important LPARs. That left just the dev and test environments.

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    Posted: May 19, 2015 |

    E850 Among the New POWER8 Servers Announced by IBM

    On April 28, IBM announced new capabilities for existing POWER8 servers. Today, it’s announcing a new POWER8 server model.

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    Posted: May 11, 2015 |

    Handy Tool Provides Adapter Info

    As I've mentioned, I follow several AIX and IBM Power Systems pros on Twitter.
    Benoit Creau (@chmod666 on Twitter) is someone you should follow as well. He's been working on a new tool called lssea that "lists information and details about PowerVM shared Ethernet adapters.” 

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    Posted: May 05, 2015 |

    Why You Should Keep a Local Alt Disk Copy

    After upgrading an AIX system, a customer found that they needed to back out of the change. They ended up restoring rootvg from an mksysb.
    Although that's one way to do it, I don't recommend it. Of course you should have an mksysb around in case of a disaster, but you should also have a local alt disk copy available. This is true for any type of upgrade, but it's especially critical for both VIO server and regular AIX upgrades.

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    Posted: April 28, 2015 |

    Simplifying PowerVM Management

    In December I wrote about a document that covers HMC simplification. Actually, the doc isn't just about that. It's also about how IBM is trying to make managing PowerVM easier for customers.

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    Posted: April 21, 2015 |

    Setting Up LPAR Error Notification

    Your shop has no budget for monitoring software, but you still want to be notified when LPAR errors appear in the AIX error log. You have a few options.

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    Posted: April 14, 2015 |

    The more Command and vi

    It's easy to overlook the simple things. For instance, did you know that vi can be invoked from within the more command?

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    Posted: April 07, 2015 |

    More Terrifying Tales of IT

    I enjoy reading IT-related horror stories, especially those that hit close to home. For me, the best thing about these stories is figuring out what went wrong and then incorporating those lessons into my own environments. Here are a couple of good reads that I want to share.

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    Posted: March 31, 2015 |

    Maxmizing IOPS

    Recently I listened to a discussion of the differences in input/output operations per second (IOPS) in various workload scenarios. People talked about heavy reads. They talked about heavy writes. They debated whether it was better to use RAID5, RAID6 or RAID10. Things got a little heated.

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    Posted: March 24, 2015 |

    Readers Discuss VIOS Installs

    Perhaps I wasn't clear when I explained why NIM is my VIO server installation option of choice. In any event, this reader's response got me thinking further about the topic:

    I prefer (to) install from the virtual media repository. It is faster with no network issue. Because when you start install always network is not ready yet. And when you are updating if your NIM is not up to date (lpp_source, spot, mksysb, ...) you take much time. With Virtual media repository you need just iso image to start install.

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    Posted: March 17, 2015 |

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