Media Database Copy
This depends on the size of the database, the network speed, the disk read speed at the source, and the disk write speed at the target. See: https://vega25.com/xport/xport-media-migration-estimator/Media Reconfiguration & Database Rebuild
The Milestone Recorder rebuilds its database after media reconfiguration, with the duration depending on the size of the database. We've observed that the two steps for 41TB of data take four hours.