VERITAS Volume Manager 3.5 Administrator's Guide (September 2004)

Creating and Administering Plexes
Introduction
Chapter 6192
Introduction
This chapter describes how to create and maintain plexes. Plexes are
logical groupings of subdisks that create 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. Because each data plex must reside on different
disks from the other plexes, the replication provided by mirroring
prevents data loss in the event of a single-point disk-subsystem failure.
Multiple data plexes also provide increased data integrity and reliability.
NOTE Most VxVM commands require superuser or equivalent privileges.