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Growing a VMFS datastore with PowerCLI

I am working on my PowerShell module for Pure/VMware operations and one of the cmdlets I am writing is for growing a VMFS. When perusing the internet, I could not find a lot of direct information on how to actually do this. There is not a default cmdlet for doing this.

The illustrious Luc Dekens talks about this problem here and even provides a great module for doing this:

http://www.lucd.info/2016/07/29/vmfs-datastores-expand-and-extend/

If you just need want to run a quick script you can use that. If you want to write it yourself here is a quick overview of what you need to do. I am talking about a specific use case of:

  • I have a datastore on one extent and that extent exists on a LUN (or device or volume or whatever you want to call it) on an array. That LUN has been grown on the array.
  • I want to grow the VMFS  to use the new capacity and not create a new extent, just grow it.

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