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jkullick/convert-vmware-esxi-thick-provisioned-disk-thin.md

Last active May 3, 2018 12:53
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Convert VMWare ESXi Thick Provisioned Disk to Thin
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convert-vmware-esxi-thick-provisioned-disk-thin.md

  1. Power-off VM

  2. Login to ESXi via SSH and convert VMDK to thin provisioned:

vmkfstools -i $THICK_VMDK -d thin $THIN_VMDK

  1. Replace $THICK_VMDK with $THIN_VMDK in the VM settings

  2. Power-on VM

  3. Login to VM to zero disk space:

Linux:

 bash dd if=/dev/zero of=/zero bs=64m rm -f /zero  

Windows:

 1. Download sdelete

 2. Run sdelete -z c:

  1. Power-off VM and login to ESXi via SSH to punchzero the thin disk:

 bash vmkfstools -K $THIN_VMDK  

  1. Power-on VM

  2. Delete $THICK_VMDK from datastore

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