Reclaim thin Provisioned space

Posted on 2013-06-23
Last Modified: 2013-07-03
I created a VM in vsphere (Thin Provisioned)and installed windows 7 on it as i wanted to use it as Master VM for VDI

Unfortunately i added some huge files to it and then deleted them thinking it will free up the space

I wasnt aware that think provisioned space wont be released back .

Is there any way i can reclaim this space back for the windows 7 machine as i cant afford to have huge Master VM.

I tried SVMotion (changed Host) Think Provisioned eagered zeroed etc ..

then SVMotion it back with Thin provisioning but that did help
Question by:MOQINFRA
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LVL 120

Accepted Solution

Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 39269575
the quickest and easiest way is to use VMware vCenter Converter Standalone  and create a V2V, and select the minimal space in the options, this will create a VM with just the space used. You can then specify thick or thin as the VM options.

see my EE Articles

HOW TO:  Synchronize changes when completing a P2V or V2V with VMware vCenter Converter Standalone 5.1

HOW TO:  P2V, V2V for FREE - VMware vCenter Converter Standalone 5.1

Author Comment

ID: 39269639
i hoped for easier way. but i will give this a shot.
LVL 120
ID: 39269752
It's the easiest and quickest method.
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Author Comment

ID: 39279151
I followed your suggestion and was able to reclaim the size. However now the properties of vm on summary tab show 20 GB free for this converted VM . But inside the windows only 16 GB shows available.

Can you suggest something i can do.
LVL 120
ID: 39279237
how do you want the disk to be configured?

Author Comment

ID: 39280415
show only what is used both in Windows and Vmware  (Thin provisioned)
LVL 120
ID: 39280488
so what do you have at present?

what space is used in the VM?

what size is the virtual disk?

Author Comment

ID: 39286799
I have attached the images that show in the properties of VM there is 20GB free , however inside Windows it shows 16GB as Free space
LVL 120
ID: 39286923
okay, so you have 23.3GB used in the VM.

is the size of the virtual disk currently 40GB?

what configuration do you want, a virtual disk size of 23.3GB? equal to the size in use in Windows?

Author Comment

ID: 39287699
How can i tell what the size of virtual disk is,.
LVL 120
ID: 39287995
Right Click the VM, Edit Settings, select virtual disk

Author Comment

ID: 39296813
Thank you for all your responses. I think I was able to reclaim the storage back

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