About Instant Recovery: block-level restore
If the Instant Recovery snapshot was made with the VxFS_Checkpoint method, large files can be recovered faster by means of block-level restore. Only the blocks that have changed are moved from the snapshot to the client's primary fileset.
Note the following:
Block-level restore requires the VxFS File System.
Block-level restore is available only when restoring files to the original location on the client, AND when the snapshot method for the backup was VxFS_Checkpoint.
If the snapshot method for the backup was VxFS_Checkpoint and the files to be restored are in an Oracle database, block-level restore is automatically enabled.
More information is available about activating and deactivating block-level restore.
More Information