Plex synchronization

Each plex or mirror of a volume is a complete copy of the data. When a plex is attached to a volume, the data in the plex must be synchronized with the data in the other plexes in the volume. The plex that is attached may be a new mirror or a formerly attached plex. A new mirror must be fully synchronized. A formerly attached plex only requires the changes that were applied since the plex was detached.

The following operations trigger a plex synchronization:

Plex synchronization can be a long-running operation, depending on the size of the volume and the amount of data that needs to be synchronized. Veritas Volume Manager provides several features to improve the efficiency of synchronizing the plexes.