On Tue, Apr 4, 2017 at 11:49 PM, Elad Ben Aharon <ebenahar@redhat.com> wrote:

Hi Gianluca,

If you don't have a copy of the template disk on ST2 it means that the VMs were created as deep copy from the template (i.e, they are independent - you can check it in the the 'general' VM sub-tab).

If this is the case then you won't have any problem with detaching ST2.

thanks for reply.

In "general" sub-tab I see

Template: my_template_name (Clone/Independent)

So I should be ok.

But for example I can have ST1 and ST2, create a template with disk in ST1, then a VM from this template again in ST1 and in a second time move the disk of this VM to ST2

In this case what would happen?

Is it in this screen when I create a VM that it is decided if deep copy or not as you wrote?
https://drive.google.com/file/d/0BwoPbcrMv8mvdTJMdkNTeF84ckk/view?usp=sharing

What would happen in case I choose "Thin" and not "Clone" in storage allocation part of resource allocation section in the image?

Also, I noticed that if I create a VM from the blank template the Thin option is checked and both Thin and Clone are greyed out so I cannot change it

Instead if I choose my template, the "Clone" option is marked as default, but I can change to Clone....

Gianluca