Affected NV Version: 7.4.5
OS Version: All
Encryption APM packaged with 7.4.5
Application version: N/A
Users may attempt to perform a DDT (Disk to Disk to Tape) backup using the Encryption APM on the first phase of the DDT process, intending to duplicate encrypted backups from one media to another.
DDT Backups backups fail when trying to run the duplication phase.
Using the Encryption APM to encrypt data to the first phase of a DDT backup intending to duplicate the data to another media is not supported under 7.4.5. The reason this does not work is because NetVault duplication does not perform a block-by-block copy. Instead, it reads every file backed up one by one, and copies it over to the media intended as a duplicate copy. Because encryption keys/passwords are maintained on each client, when the duplication phase tries to read data from an encrypted backup it won't be able to, and will fail.