Hello,

I want to know whether a base disk image is physically copied whenever the VM 
is created from a template.

I've just created a VM based on template with 1 disk and checked VM's virtual 
disk images.
there were (1)base image copied? from the template, (2)new delta image.

Here, (1) image was identical to that of the template and I know that image is 
used as read-only mode.
So, I am wondering why base (disk) image is inefficiently copied instead of 
directly referencing template's image as backing file.
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