A mirrored aggregate or traditional volume is a single WAFL storage file system with two physically separated and synchronously up-to-date copies on disks. These copies are called plexes. Data ONTAP automatically names the first plex plex0 and the second plex plex1.
Each plex is a physical copy of the same WAFL file system and consists of one or more RAID groups. Because SyncMirror duplicates complete WAFL file systems, you cannot use the SyncMirror feature with a FlexVol volume—only aggregates (including all contained FlexVol volumes) or traditional volumes are supported. The following diagram illustrates the concept of the plexes in a traditional SyncMirror relationship.
The following diagram illustrates the concept of the plexes in an aggregate SyncMirror relationship. Note that each plex includes a copy of the FlexVol volumes contained in the aggregate.
