DPM will verify whether the selected items can be read from the tape that contain them. Readability of data in a tape is ...

DPM will verify whether  the selected items can be read from the tape that contain them. Readability of data in a tape is a good indication that those data could be recovered as well.  You would be able to monitor the progress of verification in Jobs tab of Monitoring task area.  Click on OK to start the verification.