Managing plexes and subdisks

This section describes managing plexes and subdisks.

A subdisk is a set of contiguous disk blocks. VxVM allocates disk space using subdisks.

A plex is a logical groupings of subdisks that creates an area of disk space independent of physical disk size or other restrictions. Replication (mirroring) of disk data is set up by creating multiple data plexes for a single volume. Each data plex in a mirrored volume contains an identical copy of the volume data.

A plex becomes a participating plex for a volume when it is attached to a volume. Attaching a plex associates it with the volume and enables the plex for use.