HP StorageWorks 6000 HP StorageWorks VLS and D2D Solutions Guide (AG306-96028, - Page 41
Considerations for Copying to Physical Tape through the Backup Application - virtual library system user guide
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• Use the functionality of a backup application. • Copy only the specific files you need onto physical tape. • Not waste tape storage as physical tapes can be fully filled. • Monitor and track copy jobs from the backup application. • Use any tape library that is supported by the backup application. Considerations for Copying to Physical Tape through the Backup Application There are potential drawbacks to using a backup application instead of caching to copy data on the VLS or D2D to physical tape. Consider the following when deciding which data migration method to use: • You must purchase additional backup application licenses for the physical library. • You must configure a backup application with a scheduled copy job to perform the migration. • If you have the media servers on different SAN switches from the libraries, copy bandwidth is added to the SAN during data migration. Copy to Tape using VLS Automigration You can migrate data from virtual media in the VLS device to physical tape media using automigration/tape-offload to perform transparent tape migration. The automigration echo copy feature allows the VLS to act as a tape copy engine that transfers data from virtual cartridges on disk to a physical tape library connected to the VLS device. See VLS Automigration. Echo copy essentially acts as a transparent disk cache to the physical library so echo copy jobs can be performed at times other than the peak backup window. Once automigration is set up, echo copy operations are automatic and seamless to the user. Echo copy is managed through the automigration software on the VLS instead of through the backup application. HP StorageWorks VLS and D2D Solutions Guide 41