VMware Disk provisioning thin and thick conversion

VMware Disk provisioning thin and thick conversion

Mainly VMware esx/esxi host support two type Disk provisioningthin” and “thick”. Below is the brief note for disk provisioning and also here I’m explain how to convert thin to thick and thick to thin.

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*Image from www.vmware.com
  • Thick (or preallocated)

While we creating thick provisioning disk, whole defined space  allocated on physical disk, for examples we planning to allocate 50GB disk space to new virtual machine that 50GB disk space fully consumed on your physical drives.

  • Thin (or dynamically)

In thin disk provisioning system only dynamically consume the space for physical disk. For examples, if you create a 100GB disk but only use 20GB of that disk, the actual disk consumption on your physical drives will be 20GB.

*Image from www.vmware.com

How to check your disk type

Go to DC virtual machine properties (edit settings) and navigate the disk on hardware tab. See the difference:-

Thin Disk provisioning

Thick disk provisioning


Step:-1 Go to VMware vSpher Client and open your DC. And navigate the particular machine you want to change disk type. The right click the virtual machine and select “merge” option.

Step:-2 then go to merge configuration and select “change datastore” option and next.

Step3:- Select the datastore you would like to keep your virtual machine.

Step4:- then select the Disk provisioning type as you like to convert like thin to thick or thick to thin.

Step5:-Then finish the configuration and also check with the status of the conversion task  (on “recent tasks”)

Step6:-After completion of the process check with the disk type on virtual machine properties.

For more information Click here


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3 Responses to “VMware Disk provisioning thin and thick conversion”

  1. Kipi Alive Says:

    Cool, very good trick. Today I will try run this.

  2. Andrew Says:

    I think you meant ‘MIGRATE’ instead of ‘MERGE’ ??

  3. Rab Says:

    Lucky I found this site at 1am – definitely saved a lot of time. One note though, if you do not have vmotion licensed in your cluster, just turn the VM off and repeat step 1

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