Failover and External Storage

External storage for LogLogic ST Appliances, such as NAS storage, is not replicated as part of the failover configuration.

When configuring a NAS device used by an LogLogic ST Appliance in an HA pair, add the private IP addresses of both LogLogic ST Appliances and the public IP address to the NAS device’s accepted IP address list.

When an LogLogic ST Appliance fails over, its NAS storage is automatically switched over to the standby appliance as it becomes active. For example:

  1. Appliance 1 is the active LogLogic ST Appliance, and appliance 2 is the standby LogLogic ST Appliance, NAS storage is in use by appliance 1.
  2. Appliance 1 fails, appliance 2 becomes the new active appliance.
  3. Appliance 2 immediately starts using the NAS storage directly, just as appliance 1 had before.