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What is this Catalog folder on my datastore?

Duncan Epping · Feb 22, 2021 ·

A question popped up on our internal slack earlier these days, and as I didn’t find anything online for it I figured I would write a quick article. When you look at your datastore, you may find various folders. Some you will recognize like the “.vSphere-HA” folder structure, which is used by vSphere HA, others you may not recognize, like the folder called “catalog” (see screenshot below), which has folders like “shard”, “mutex”, “tidy”, and “vclock” in it. The folder “catalog”, and all folders underneath, are created automatically when you use First Class Disk’s (FCD). FCD uses the folder structure to store it’s metadata in it. So please do not remove/delete or touch these folders. If you like to know more about FCD, make sure to read Cormac’s post on it.

Oh and if wonder why you are using FCD in the first place, it is often used for Kubernetes “persistent volumes”. So if you are using Tanzu/Kubernetes and have persistent volumes, chances are you are using FCD, which would result in those folders on your datastore. Nothing to worry about. 🙂

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Server catalog, files, folders, Storage, vmfs, VMware, vsan, vvols

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About the author

Duncan Epping is a Chief Technologist in the Office of CTO of the Cloud Platform BU at VMware. He is a VCDX (# 007), the author of the "vSAN Deep Dive", the “vSphere Clustering Technical Deep Dive” series, and the host of the "Unexplored Territory" podcast.

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