Active Upgrade State Model - NEC Express5800/320Fd-MR N8800-123F, EXP320K User Manual

5-88 Installing and Using Utilities

Active Upgrade State Model

The state model in Figure 6 shows all of the possible Active Upgrade states, and the order in which
they occur during the Active Upgrade process.
Figure 6. Active Upgrade State Model
The state model helps to demonstrate the sequence of events in the Active Upgrade process, as
follows:
1. All upgrade sessions start in the Idle state, where you can run the readiness check as many
times as necessary to verify that your system meets the prerequisites of the Active Upgrade
process.
2. When you start an upgrade session, the Active Upgrade Console switches to the PrepareSplit
state, during which it runs a final readiness check and additional background tasks. If the
system is ready, the console immediately switches to the Split state and proceeds to divide the
system into two independently running systems.
IMPORTANT:
After the upgrade session leaves the Idle state, you must complete the full upgrade process in
sequence, or, if necessary, abort the process altogether. You cannot go back to a previous state
or skip states, and you cannot proceed to the next state if the upgrade is in a Broken or Busy
operational state.