Teradata database restart? - response (4) by ToddAWalter

Good question - I did not comment on the return to service part...
If there is a standby node, then when the failed node is repaired it is returned to the configuration automatically as the new standby node. No further restart is required.
If no standby node, then when the failed node is repaired, another restart must be scheduled to return to the full configuration with the AMPs migrated back to the repaired node.
Each of the restarts mentioned is an automatic process except the return to service one which must be initiated at your convenience. All of these restarts are 3-5 minute events.