Tag Archives: vSphere5

Secondary machine of a Fault Tolerant set still hanging around

I had an issue today where  the secondary instance of a virtual machine with Fault Tolerance enabled was registered to a host (vSphere 5 ESXi) – even tho the original VM wasn’t in inventory at all. Sorry, no screen shots … Continue reading

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Shooting yourself in the foot is bad (Where are my swap files?)

vSphere by default stores vswap files (the files used when your host runs out of physical memory to allocate) with the local machines. However, you can choose (on a per VM or per-host basis) to direct all swap files to … Continue reading

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Where oh where did that little vCSA go?

The VMware vSphere vCenter Server Appliance (vCSA) is a niflty little management option available with all kits and editions of vSphere, letting you manage your environment with almost* all the bells and whistles without needing a separate Windows license.   Sounds … Continue reading

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Extensions of Raw

I’ve seen some docs and data out there that exhibit confusion over the file extension for an RDM file, describing it as .rdm.vmdk or -rdm.vmdk or other variations. A quick ls from a VM with a RDM shows: there is … Continue reading

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Thin Expansion (vSphere5)

Here’s a curious one. The max size of a thin-provisioned VMDK on a VMFS5 datastore is 2TB. If you create a new VMDK you’re allowed to create it at 2048GB/2TB.   However when you go to expand an existing VMDK … Continue reading

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ESXi no management network redundancy

After configuring a vSphere cluster for High Availability you might see this message on the summary page of your hosts. It’s a nice reminder that your VMkernel Port carrying management traffic only has one NIC available, and is flagged by … Continue reading

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Jumbo vs Flow Control

Don’t forget to check your Ethernet switches for Jumbo vs Flow Control support and recommendations – and double check your config to make sure it matches. Some switches support both, some prefer one over the other – or you might … Continue reading

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