text: For environments with higher bandwidth, non-cycling Global Mirror can be used so that less 
  than a second of data is lost if a failure occurs. Global Mirror also works well when sites are 
  more than 300 kilometers (186.4 miles) apart. 
  
  When Storwize V7000 copy services are used, all components in the SAN must sustain the 
  workload that is generated by application hosts and the data replication workload. Otherwise, 
  the system can automatically stop copy services relationships to protect your application 
  hosts from increased response times. 
  
  Starting with software version 7.6, you can use the**chsystem**command to set the maximum 
  replication delay for the system. This value ensures that the single slow write operation does 
  not affect the entire primary site. 
  
  You can configure this delay for all relationships or consistency groups that exist on the 
  system by using the**maxreplicationdelay**parameter on the**chsystem**command. This value 
  indicates the amount of time (in seconds) that a host write operation can be outstanding 
  before replication is stopped for a relationship on the system. If the system detects a delay in 
  replication on a particular relationship or consistency group, only that relationship or 
  consistency group is stopped. 