Pierre Flammer

VMware Space Reclamation - On All Datastores

Blog Post created by Pierre Flammer Employee on Jul 29, 2016

Reclaiming space in VMware is an annoying thing.

But with a little help from VMware's community it can be a much simpler process.

I saw a recent comment in an old Thread and thought it would be a good idea to finally post this.

I found the attached script here: https://communities.vmware.com/message/2437373


Here's what the script does after you pointed it to vCenter:


1) Get a list of all datastores and loop through them.

2) Find out how much space is free and calculate 0,5% of that.

    This is something you can tune in line 144. (I've never touched it)

[decimal]$freeDSSpace = $ds.FreeSpaceMB

$unmapSize = [MATH]::round($freeDSSpace*.005)

3) Run the vmfs unmap


I've been using this Script for the past year and gave it to most of my customer.

Never saw any problems with it.


Have fun!