text: Figure 11-88 Write on volume in Metro Mirror relationship 
  
  However, this process also means that the application is exposed to the latency and 
  bandwidth limitations (if any) of the communication link between the master and auxiliary 
  volumes. This process might lead to unacceptable application performance, particularly when 
  placed under peak load. Therefore, the use of traditional Fibre Channel Metro Mirror has 
  distance limitations that are based on your performance requirements. IBM Spectrum 
  Virtualize does not support more than 300 km (186.4 miles). 