This document aims to answer questions about why data might need to be deleted from a DataDomain, and how this can be achieved.
There are 3 main reasons why manual removal of data from a DataDomain may be considered: 1) The system is close to full and more free space is required. 2) A backup application has been decommissioned, but its data remains on the DataDomain 3) Data has become orphaned from the backup application which wrote it.The backup application is responsible for writing data to the DataDomain during a backup; reading data from the DataDomain as part of a recovery; maintaining a catalog or database of this data; determining when data has reached its retention period; and expiring data. Data is considered orphaned if it exists on the DataDomain, but is no longer controlled by the backup application which wrote it. Data in this state will remain on the DataDomain and will not be freed by cleaning.
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