PRIMECLUSTER Global Disk Services Configuration and Administration Guide 4.1 (Solaris(TM) Operating System)

1.6.2 Using the Copy Function of a Disk Unit

Volumes can be copied with the copy function of a disk unit and the copy destination disk areas can be recognized as volumes (shadow volumes) and accessed.

To run another service concurrently with the service, the application volume must be replicated. The operation pattern that uses the copy destination disk areas created with the copy function of a disk unit is available as well as the operation pattern that uses proxy volumes, as replications of the volumes used in the service.

For the operations patterns and the procedure for backup and restore using the copy function of a disk unit and using shadow volumes, see "Backing Up and Restoring through Disk Unit's Copy Functions."

[Figure: Backing Up a Replication Created with the Disk Uni't Copy Function]

You can configure a disaster recovery system at a place geographically distant using the copy function between disk bodies. If the domain running the service is affected by disaster, the disaster recovery system will conduct the service alternatively using the copy destination disk areas as shadow volumes until the domain recovers from disaster.

[Figure: Disaster Recovery System]