Scenario: Performing backups in geographic mirroring environment

Start of changeThis scenario provides an overview of tasks that are necessary when performing a remote backup in a PowerHA® solution that uses geographic mirroring.End of change

Overview

In this example, a system administrator needs to perform a backup of data stored on independent disk pools that are used in a high-availability solution based on geographic mirroring technology. The administrator does not want to affect the production system by taking it offline to perform the backup. Instead the administrator plans to temporarily detach the mirrored copy, and then perform a backup from the second copy of data located on independent disk pools at a remote location.
Note: Detaching the mirrored copy essentially ends geographic mirroring until the copy is reattached to the production. During the time it is detached, high availability and disaster recovery are not operational. If an outage to the production system occurs during this process, some data will be lost.

Details

The following graphic illustrates this environment:

Cross-site mirroring with geographic mirroring

Configuration steps

Start of changeComplete the following steps when performing a backup of a mirror copy using the PowerHA graphical interface:
  1. Detaching mirror copy
  2. Making disk pool available
  3. Backing up independent disk pool
  4. Make disk pool unavailable
  5. Reattaching mirror copy
End of change
Start of changeComplete the following steps when performing a backup of a mirror copy using other interfaces:
  1. Quiescing an independent disk pool
  2. Detaching mirror copy
  3. Resuming an independent disk pool
  4. Making disk pool available
  5. Backing up independent disk pool
  6. Make disk pool unavailable
  7. Reattaching mirror copy
End of change
Parent topic: Scenarios: Performing backups in a high-availability environment