Home > Storage > PowerStore > Storage Admin > Dell PowerStore Manager Overview > Protection: Metro Witness
Starting with PowerStore version 3.6, Metro Volume supports a witness server. The witness server is software that is installed on a host at a third site. The witness monitors the status of the local and remote PowerStore systems. When a failure occurs, the witness determines which system remains accessible to hosts and continues to service I/Os. This adds more resiliency and further mitigates the potential risk of split-brain scenarios.