Figure 1-3. Merged System - NEC Express5800/320Ma User Manual

Figure 1-3. Merged System

Console
Network
Finally, the system restarts your applications, including the Active Upgrade
console, from the Upgrade Side system disk. Depending on the complexity of your
applications and the upgrade you performed, your applications may be back up and
running in under a minute.
7. After the system is successfully merged, you can test your applications and verify
the success of your upgrades with full access to the system's resources. If you
discover a problem, you can still abort the upgrade process and restore the system
to its previous state, because the original copy of your system disk (on the
Production Side) has not been overwritten yet.
8. When you are certain that the upgrades were successful, you can commit the
changes to make them permanent.
When you commit the changes, the Active Upgrade console resynchronizes the
RDR disks in your system by overwriting the original Production Side system disk
and stale Upgrade Side data disks with their partner disks, which are up-to-date
(Figure 1-4).
N O T E
Because the original version of your system disk is erased
during the commit process, you cannot abort an upgrade
session after initiating the commit process.
Duplexed System
External
Storage
Overview of the Active Upgrade Process
Internal Storage
Data
(Old System) (Current Data)
Mirror
Disabled
System
(Upgraded) (Old Data)
duet003
Overview 1-5