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The deletion of a volume does not delete the snapshots that have been created from the volume When a VM is destroyed, data disk volumes that are attached to the VM are not deleted. Volumes are permanently destroyed using a garbage collection process. The global configuration variables expunge.delay and expunge.interval determine when the physical deletion of volumes will occur. expunge.delay: determines how old the volume must be before it is destroyed, in seconds expunge.interval: determines how often to run the garbage collection check Administrators should adjust these values depending on site policies around data retention.