Hi Natalia,

When a volume is attached to a disk it has some more additional attributes like:

virtualmachineid = 52a21f95-4209-45a4-ad7b-c117f16d451a
vmdisplayname = VM-52a21f95-4209-45a4-ad7b-c117f16d451a
vmname = VM-52a21f95-4209-45a4-ad7b-c117f16d451a
vmstate = Running
zoneid = ba5aa0d4-9518-4663-abb5-9f0ac183d577

using cloudmonkey you can easily call the listVolumes API and monitor this, for 
example: 

On management install cloudmonkey (pip install —upgrade cloudmonkey)

$> cloudmonkey

$> list volume id=[ID]
==> returns a JSON with the volume attributes

You can also choose a different response format if you want to filter the data. 
$> set display
csv      default  json     table    xml

When you expunge a VM the attached disk will remain, this way it cloud be 
attached to different VM of the same hypervisor type, but it will be missing 
the mentioned attributes. So If you’re looking to delete volumes that are not 
attached to VMs you can look for volumes without these attributes. 

Thanks,
Boris. 



> On Feb 3, 2017, at 12:02 PM, Natalia Costas Lago <[email protected]> wrote:
> 
> 
> HI,
> 
> 
> I have seen that when a VM that has attached an additional disk is expunged 
> the volume that has attached remains in the storage.
> 
> Most of the times I end up with many volumes that we are unsure if they 
> should be deleted or not. The information about the VM that has been 
> connected to the data volume is lost.
> 
> How do you handle cleaning up of those data volumes?
> 
> Thanx,
> Regards,
> -- 
> ====================================================
> Natalia Costas Lago
> Senior Communications Technician
> Galicia Supercomputing Centre (CESGA)
> (CESGA on Twitter <https://twitter.com/#%21/CESGA_>  | CESGA on Facebook 
> <https://www.facebook.com/profile.php?id=100000707537407>)
> 
> Avenida de Vigo, s/n (Campus Vida)
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> 
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> ====================================================
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