Site consistency means that the data in the plexes for a volume must be consistent at each site. A site-consistent volume has the same number of plexes, or mirrors, on each site in the disk group. A site-consistent volume must have at least one plex, or mirror, on each site in the disk group. The site consistency of a volume is ensured by detaching a site when its last complete plex fails at that site. If a site fails, all its plexes are detached and the site is said to be detached. Turn on this behavior by setting the siteconsistent attribute to on.
Site consistency is intended for data volumes. The feature is not recommended for the boot disk group. Because DCO logs are not supported, the feature might cause an undesirable increase of recovery time for the boot disk group.
If you turn on the site consistency requirement for a disk group, each new volume created in the disk group inherits the site consistency of the disk group, by default. Setting the siteconsistent attribute on a disk group does not affect existing volumes in the disk group. You can also control the site consistency on individual volumes.
Before setting site consistency on a disk group, be sure to meet the following requirements:
To turn on the site consistency requirement for a disk group
To view the setting for the site consistency requirement