Use the vxrsync utility to perform initial synchronization of the volumes between the source and target volumes. This utility is mainly used for performing synchronization when the target host is detached and you can perform either full or difference-based synchronization. You can choose the type of synchronization depending on the amount of data that has changed on the source volume. However, using this utility for difference-based synchronization when the number of changes are too many may not be very useful. The vxrsync utility can be used to synchronize volumes on multiple target hosts.