Category Archives: Information Technology

Upgrading a KVM/QEMU Windows Guest Domain to Windows 10

You are likely to run into the following error during the upgrade process: Windows 10 installation failed in SAFE_OS phas with error during boot The error code reported to you when you reboot the system and it rolls back changes … Continue reading

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Extending Storage for an LVM-Backed Windows Guest Domain with KVM/QEMU

Well that was significantly more painful than I had anticipated.  Here’s the quick and dirty instruction set which involves multiple tools, perhaps needlessly, since I was investigating the issue for some time: Shut down the guest domain (someone might be … Continue reading

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Linux Kernel 4.7 Memory Allocation Bug (mm/slub.c)

Just a heads up if you’re seeing unpalatable behavior with your Fedora 23 or Fedora 24 rig running any of the 4.7.* kernels:  It looks like Kernel 4.7 may have introduced a memory management bug.  It looks like the bug … Continue reading

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Navigating the Tianocore UEFI Shell

Just in case you end up getting dropped to the UEFI shell when attempting to start a Windows guest domain with KVM/QEMU/Tianocore, I thought I might post a little shot from Alex Williams’ extremely helpful series (to which I’ve already … Continue reading

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Compiling and Installing mod_wsgi 4.5.6 on RHEL/CentOS 6

Just a quick note in addition to the troubleshooting post I provided; When compiling mod_wsgi from source (which is Graham Dumpleton’s serious recommendation), you may choose to compile the module with a different version of Python than that which is … Continue reading

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Troubleshooting Apache httpd and mod_wsgi with Anaconda Python 3.5 on RHEL/CentOS 6

Man, I have spent many hours over the last few days figuring out why, exactly, I am having so much trouble getting mod_wsgi to do so much as present a simple test application.  The issues I have encountered have seemed … Continue reading

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Fedora 24 NFSv4 Clients Spontaneously Mount Previously-Working Shares as Nobody:Nobody!

A Bug Report is Already In:  https://bugzilla.redhat.com/show_bug.cgi?id=1372136 The Quick Fix Up Front:  executing sudo dnf downgrade libnfsidmap suffices to resolve the matter until the new package version is out with the fix. Man, that was annoying.  I’m glad people are already on … Continue reading

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Virtualizing Windows 7 with Fedora 23 KVM/QEMU and IOMMU-enabled PCI Passthrough

I finally got around to whipping up the Windows 7 VM to round out and more or less complete the Engineering Walden Project’s Technical Reference Model.  Hooray! Because I had already configured my KVM/QEMU system with the proper pci-stub entries … Continue reading

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Using systemd and Logical Volume Manager Snapshot Volumes During Fedora Operating System Upgrades

With the looming end of support for Fedora 22, I thought I might write this up: I just successfully made use of this solution (based on instructions from the excellent ArchWiki) and I thought I’d provide documentation here since it’s … Continue reading

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Upgrade Notes: Fedora 22 to Fedora 23

Well, despite the relatively complexity of my home server arrangement, I am happy to report that the Fedora team has succeeded in providing a distribution that smoothly upgrades without any additional administrative intervention!  Hooray! Nonetheless, to be safe, I recommend … Continue reading

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