If booting the system becomes unavailable due to a failed system disk or damaged data, you can switch the environment to the alternative boot environment created on proxy groups to enable the system to continue operating. You can restore data back to the original system disks by joining the disk areas for backup as the master and the original system disks as the proxy.
Figure 6.6 Restore
Figure 6.7 Restore Schedule
Note
ETERNUS Disk Storage System SAN Boot Environment
When the OPC function is available, after switching to the alternative boot environment, it is possible to restore data from the proxy to the master without breaking the relationship between the master (original system disks) and the proxy (disk areas for backup). For conditions under which the OPC function is used, see "A.2.24 Instant Snapshot by OPC."
