Created attachment 557681 [details]
screenshot: new domain can not be added

Description of problem:
handle when iSCSI LUN chosen for new domain already contains one

Version-Release number of selected component (if applicable):
ovirt-engine-webadmin-portal-3.0.0_0001-1.2.fc16.x86_64

How reproducible:
always

Steps to Reproduce:
1. create a storage domain on an iSCSI LUN
2. remove the domain from Data Center without physically wiping it
3. open the New Domain dialog, select Data/iSCSI, discover targets, login to the target
  
Actual results:
the LUN with existing Data domain is not shown. See the attached screenshot: the logged-in target appears empty, however it contains existing storage domain

Expected results:
show the LUN with its size and "more info" button. When the button is clicked, another dialog window should pop up containing:

* detailed info about existing SD (size, URI of Engine, 
  name of DC, status in DC, last used date if Status is 
  unattached, maybe list of VMs)

* import button (after bug #773318 and/or RHEV bug #716511
  is implemented)

* format button that would clean up existing domain. It should
  give warning in any case, the warning should be Big Phat
  Warning if the domain is Attached or Up

Additional info: