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That is because Provisioned is seen from the outside, it is the space allocated to a vDisk when you created the VM.

The FreeSpace and UsedSpace is from inside the guest OS (obtained through VMware Tools).
When your vDisk is of type Thin, vSphere is not giving you that physical space immediately, it is extended as usage grows.
The guest OS sees the allocated size, not the provisioned space.f

Example:
- a VMDK of type Thin, with size 60 GB

- the VMDK starts with allocated space 0, which grows as you place data on the disk

- the guest OS sees the harddisk always as 60 GB

And don't forget that there is overhead.
A VMDK of 60 GB, will not be exactly 60 GB of usable storage inside the guest OS.


Blog: lucd.info  Twitter: @LucD22  Co-author PowerCLI Reference

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