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NetApp fail
I won’t go into detail on why LUN misalignment is bad, but the short story is that it is not good for performance as the filer is working harder than it should be so it is something that you want to...
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NetApp fail #2
After you add new disks to an aggregate, NetApp recommend running a reallocate to spread the existing data over to the new disks. This is an excruciatingly long process and can cause a performance...
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Virtual Storage Console fail
Netapp’s Virtual Storage Console (VSC) plugin for VMware is generally a pretty good tool for managing storage through VMware, though it does have its issues. When you take VM level snapshots in VMware,...
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VMWare/Cisco Fail
We use vCloud Director here to allow customers to provision their own virtual datacentres, servers, etc. I was tasked to fix an already existing vCloud Director installation that was not working (and...
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The packetloss of doom
We had this weird issue where VMware hosts would randomly start getting packet loss, causing service interruptions to the virtual machines hosted on that server. Initially we suspected that we were...
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Netapp fail #3
We had an issue the other day where the B controller decided to stop working. Users starting complaining about performance so I logged on to the B controller and ran a sysstat, as shown below. As you...
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VMware Host Profiles fail
We use host profiles to maintain a consistent configuration across all our VMware hosts. I recently upgraded our hosts to ESXi 5.1 and created a new ESXi 5.1 profile, since the old 4.1 profiles could...
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VMWare 5.1 SSO fail
I recently upgraded our environment to vCenter 5.1 Update 1 from vCenter 5.0. Update 1a was not available at the time, and I was confident that we would not be affected by the login bug that was in...
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Java fail
I hate Java with a passion and wish vendors would stop using it for their web interfaces and products (I was really happy when HP provided a Dot Net option for their ILO3 interface – it worked really...
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VM-FEX fail
Another day, another peculiar issue cropped up with the Virtual Machine Fabric Extender (VM-FEX) in our environment. I upgraded our ESXi environment from 4.1 to 5.1 Update 1 and installed the new...
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