NEC Express5800/320Fd-MR, User Manual

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Installing and Using Utilities 5-87
Aborting the Active Upgrade Process
Aborting the Active Upgrade process stops the current upgrade session and returns your system to
its original state. If necessary, you can abort the Active Upgrade process at any point up until you
commit the upgrade.
If you abort the upgrade session while the system is in split mode, no downtime is incurred. Your
applications continue to run on the Production Side while the Active Upgrade Console restores the
system to duplex mode.
If you abort the upgrade session while the system is in merge mode, a short period of downtime is
incurred while the Active Upgrade Console initiates a system restart. The Active Upgrade Console
shuts down the Upgrade Side and restarts the system from the Production Side, which automatically
restarts your applications from the Production Side. The period of downtime is only as long as it
takes your system and applications to restart.
In either case, the abort process uses RDR resynchronization to restore the internal disks to their
original state by
overwriting the unwanted Upgrade Side system disk and stale Upgrade Side data
disks with their original partner disks (Figure 4).
Figure 5. Aborting the Upgrade
After you abort the Active Upgrade process, you can start another Active Upgrade session as soon
as the RDR disk resynchronization is complete.
TIPS:
Active Upgrade State Model, page 5-88
Active Upgrade Process, page 5-83
Software Upgrade Support, on page 5-90
Prerequisites, page 5-92