Start site-to-site mirroring

After you have prepared your system for mirroring, follow these steps to start remote mirroring:

1. Enable remote load source mirroring. This enables you to have a load source as part of the remote group of disk units.
2. Start mirroring using the start mirroring function.

   When mirroring is started the system uses the resource name to recognize the remote buses and attempts to pair the disk unit on the remote buses with the disk unit on the local buses. Because remote load source mirroring is enabled, the system also pairs the load source with a remote disk unit. Mirroring restrictions that concern total disk pool capacity, an even number of disk units of each capacity, and so forth, apply.

3. On the confirmation panel for start mirroring, verify that all mirrored pairs have a level of protection of Remote Bus. If they do not, press F12 to cancel start mirroring, determine why some units have a lower level of protection than expected, fix the problem, and attempt to start mirroring again.