Are vvol snap disks supposed to give a new uuid within

Assuming you are talking about the OS level signature with a Pure snap… Yes it will be identical (because everything formatted on the disk is Identical). If you unmount the disk and run xfs_admin -U generate /dev/mapper/XYZ this should regenerate that UUID. Otherwise, if the snap you are referring to is a VMware based snap and the UUID is the vvol UUID. From a VMware perspective, I think the vVol UUID is identical. I’ve only ran across issues with this when running Get-VvolUuidFromVmdk and subsequently Get-PfaVolumeNameFromVvolUuid. In that case Get-PfaVolumeNameFromVvolUuid will actually return two disks. Just filter out the one containing -snap- Hope this helps!