IBM(000-237)單項(xiàng)選擇題每日一練(2019.01.19)

A HACMP/XD：HAGeo cluster has been installed with four nodes， two nodes at each site. The cluster is protected from site isolation by the DBFS facility in HACMP/XD：HAGeo. 
In the event of a site failure，what happens？（）  

Following a successful migration，it is highly recommended that concurrent Volume Groups be Converted to enhanced concurrent capable Volume Groups. 
In order to follow this recommendation，what step must be completed first？（）  

During normal cluster processing in a five-node cluster，one of the nodes unexpectedly crashes. A review of the system dump indicates that a DMS timeout has occurred. The cluster is configured to use disk heartbeats as a Point-to-Point network. 
What should be done to address the problem with this configuration？（）  

Company.com with a newly installed cluster has been checking the logfiles to determine if the  cluster has had any recent activity. The non-IP RS232 heartbeat connection seems to be having a difficulty. The serial network goes down，and then a couple of minutes later comes back up again. This pattern is repeated many times in the log. 
If this system was installed without regard to best practices， what is the most likely problem with the serial network？（）