After the slave MPU is started, the master MPU will synchronize informations to the slave MPU. At this time, the MPU cannot switchover. Before switchover, you need check the current state of the system to determine whether switchover is allowed:
Check the master/slave state:
display switchover state
The display information may be as follows:
HA FSM State(master): Slave is absent. ? Slave is absent, unable to switchover
HA FSM State(master): Waiting batch backup request from slave.
HA FSM State(slave): Waiting. ? Waiting for slave board request approved, unable to switchover
HA FSM State(master): Batch backup.
HA FSM State(slave): Receiving batch data. ? Data is being approved, unable to switchover
HA FSM State(master): Realtime and routine backup to slave.
HA FSM State(slave): Receiving realtime and routine data. ?Realtime state, able to switchover
Before plugging out the master MPU for switchover, determine the master/slave state. If the master/slave state is not correct, switchover is not allowed.
Switchover command:
slave switchover
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