December 28, 2015

Linux: Replace Disk in MD

On my lab machines I use a pair of physical disks, configured in a RAID 1 with MD, with LVM on top of that.  This gives me a lot of flexibility with full redundancy.  However recently I had a failure of a drive. Identify the Failure Here is what MD was telling me after I identified and removed the drive from the chassis to send […]
September 16, 2015

Bash: Dynamic Volume Group Mounter

This is similar, but an enhanced version of my custom_mount.sh previously published here: Bash: Automatically Mount File Systems on Volume Group if Present. This previous version was just a simple init script.  This updated version is designed for newer Linux distributions that use Systemd instead of Init. The Code The majority of the work is done by dvgmounter.sh.  It will check if the Volume Group is […]
September 15, 2015

Fedora 20: Use PPTP VPN

I have had this one in the queue for a while (I don’t even run of Fedora 20 anymore).  This one will be short and sweet, because there really isn’t a bunch of discussion that needs to go into it. By default Fedora 20 will block outbound PPTP VPN connections. Reload the rules.
March 4, 2015

Fedora 20: Firefox Reports Flash as Vulnerable

This problem starts with Firefox reporting that your flash-plugin is out of date.  This report looks like this and disables all flash. After this we will take a look Mozilla’s Plugin Check to see what it thinks is going on. Now here we can see that version 11.2.202.440 is vulnerable.  We will then check about:plugins to see if it agrees. Again this is also reporting […]
February 26, 2015

BlackBerry Z30: No Update to 10.3.1

I have a BlackBerry Z30 (STA100-5) which I was excited to updated to the latest release of BB10, which was announced on February 9, 2015 (link).  However when I was attempting to install the update over the air, it kept telling me that I was already on the latest version.  This was obviously incorrect (I was on 10.2.1.3062 which is the latest prior to 10.3.1). […]
December 17, 2014

SPARC Logical Domains: Alternate Service Domains Part 3

In Part One of this series we went through the initial configuration of our Logical Domain hypervisor, and took some time to explain the process of mapping out the PCI Root Complexes, so that we would be able to effectively split them between the primary and an alternate domain. In Part Two of this series we took the  information from Part One and split out […]
December 16, 2014

SPARC Logical Domains: Alternate Service Domains Part 2

In Part One of this series we went through the initial configuration of our Logical Domain hypervisor, and took some time to explain the process of mapping out the PCI Root Complexes, so that we would be able to effectively split them between the primary and an alternate domain. In Part Two (this article) we are going to take that information and split out our […]
December 15, 2014

SPARC Logical Domains: Alternate Service Domains Part 1

In this series we will be going over configuring alternate I/O and Service domains, with the goal of increasing the serviceability the SPARC T-Series servers without impacting other domains on the hypervisor.  Essentially enabling rolling maintenance without having to rely on live migration or downtime.  It is important to note, that this is not a cure-all, for example base firmware updates would still be interruptive, […]
December 9, 2014

SPARC Logical Domains: Live Migration

One of the ways that we are able to accomplish regularly scheduled maintenance is by utilizing Live Migration, with this we can migrate workloads from one physical machine to another without having service interruption.  The way that it is done with Logical Domains is much more flexible than with most other hypervisor solutions, it doesn’t require any complicated cluster setup, no management layer, so you […]
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