Vmkfstools -d Jun 2026

Analysis: The datastore may have 1TB of physical space but host 20 VMs each provisioned for 100GB (2TB total provisioned). This leverages the assumption that not all VMs will use 100% of their allocated space simultaneously.

Using -d thin introduces the risk of datastore overcommitment. If the physical storage runs out of space while a Thin-provisioned VM attempts to write, the VM will pause or crash. vmkfstools provides a method to manually inflate a thin disk to thick to prevent this: vmkfstools -d

To avoid errors, use absolute paths (e.g., /vmfs/volumes/Datastore01/VM01/VM01.vmdk ). Conclusion Analysis: The datastore may have 1TB of physical