HP B6960-96035 manual Mount requests in a restore session, Parallel restores

Mount requests in a restore session

What is a mount request?

A mount request appears in a restore session when the media needed for restore are not available in the device. Data Protector allows you to configure a desired action that should happen when a mount request appears.

Responding to a mount request

Responding to a mount request includes providing the required media or any copy of media and telling Data Protector to proceed with the restore.

Parallel restores

What is a parallel restore?

In a parallel restore, interleaved data from multiple objects is read concurrently from media in a single path and restored. A parallel restore significantly improves restore performance when restoring multiple objects from the same media. For more information, see Figure 66 on page 229.

How does it compare to a standard restore?

Data from multiple Disk Agents is (most of the time) multiplexed and stored on the media. See Figure 41 on page 149. In a standard restore, Data Protector reads multiplexed data from the media and assembles only the parts needed for the selected object. When the next object is restored, Data Protector must rewind the media and read the parts for the other object, assuming both objects are on the same medium and written using multiplexing.

228 How Data Protector operates