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Why use object copy?
Additional copies of backed up data are created for multiple purposes:
• Vaulting
You can make copies of backed up objects and keep them in several locations.
• Freeing media
To keep only protected object versions on media, you can copy such object
versions, and then leave the medium for overwriting.
• Demultiplexing of media
You can copy objects to eliminate interleaving of data.
• Consolidating a restore chain
You can copy all object versions needed for a restore to one media set.
• Migration to another media type
You can copy your backups to media of a different type.
• Support of advanced backup concepts
You can use backup concepts such as disk staging.
Vaulting
Vaulting is a process of storing media in a safe place, often called a vault, where
they are kept for a specific period of time. For details, see “Vaulting” on page 151.
It is recommended to keep a copy of the backed up data on site for restore purposes.
To obtain additional copies, you can use the object copy, object mirror, or media
copy functionality, depending on your needs.
Freeing media
You can minimize the media space consumption by keeping only protected backups
and overwriting unprotected ones. As a single medium may contain both, you can
copy protected objects to a new media set and leave the medium for overwriting.
See Figure 32 on page 117.
Planning your backup strategy116