Configuring disk type DFC devices for AIX with MPIO


   Article Number:     504379                                   Article Version: 3     Article Type:    How To 




Data Domain,Data Domain Boost - Open Storage






      DFC support in AIX to use a disk type device   

    DFC support in AIX was initially introduced with DDOS 5.6 and plugin 3.1.   
    It required installation of a specifc device driver, DDdfc, on the AIX host to discover and configure DFC devices.   
    DDdfc device driver has several limitations and one of the most important was lack of support for AIX native multipathing, MPIO.   
    The new disk type device removed the requirement for a special device driver in AIX and in conjunction with new ODM definitions added support for MPIO.   



      Requirements for disk type device   

  •         DDOS     
  •         DDBoost plugin     
    To get also support for MPIO on AIX a new package of ODM definitions is also required:   
  •         ODM definitions (supported only in AIX 7.1 and 7.2)     

      DDR Configuration   

  1.         Create a new Access Group for DD-Boost FC service     
# ddboost fc group create <group-name>    
  1.         Add one or more initiators     
# ddboost fc group add <group-name> initiator <initiator-spec>    
  1.         Add DFC devices to the Access Group of type disk  (currently this option is only available in CLI)     
#  ddboost fc group add <group-name> device-set [count <count>] [endpoint {all | none | <endpoint-list>}] [disk]    
      If disk is not specified then the default DFC device type, Processor, is added.   
  1.         Review Access Group configuration and confirm that you have only disk type devices     
# ddboost fc group show detailed <group-name>DDBoost FC Group: <group-name>State: activeDDBoost FC Initiators:Initiator Name   System Address--------------   -----------------------<initiator alias> <initiator wwpn>--------------   -----------------------DDBoost FC Devices:Device Name     LUN   Endpoints-------------   ---   ---------ddboost-disk0     0         allddboost-disk1     1         allddboost-disk2     2         allddboost-disk3     3         allddboost-disk4     4         all-------------   ---   ---------    
  •         Must use separate groups for devices that need to be shared to a disk based and to a processor based client     
  •         The same initiator cannot be used for both processor and disk     

      AIX host configuration   

  1.         Download ODM package from     
  3.         Copy the file to AIX host     
  5.         Install ODM package and discover new DFC devices     
# uncompress EMC.AIX. tar -xf EMC.AIX. inutoc .# installp –acgXd . EMC.DataDomain.fcp.MPIO.rte# lsdev -Cc disk -F name | xargs -n1 rmdev -dl# cfgmgr    
  1.         Confirm that devices have been configured     
# lscfg -vp | grep MPIO    
  1.         Optionally you can also test device visibility and connection with ddpconnchk tool, available at     
      You have to select a ddpcconchk delivered for DDOS and DDBoost release supporting DFC disk devices   
  1.         Check KB Fibre Channel Devices with Products using DDBoost in Linux/UNIX Environment to correctly set permissions for devices     









  •         AIX DDBoost plugin will search for DDdfc devices before it looks for hdisk devices     
  •         If you configured DFC processor devices before and you don't need them anymore, because you are moving to DFC disk devices, before starting with new configuration you can remove the DFC processor devices configuration for the specific AIX host on DD, then uninstall DDdfc driver and delete DDdfc devices in AIX:     
# installp -u DDdfc.rte   # rmdev -Rdl DDdfc# cfmgr