sddpcm_get_config -Av
这个命令可以在主机端查看DS4K/5K的LUN是否分布在Prefer的controller上
                                                                 
AIX:/#sddpcm_get_config -Av                                      
Frame id 0:                                                      
    Storage Subsystem worldwide name: 60ab8006e56e00004b85d99c   
    Controller count: 2                                          
    Partition count: 1                                           
    Partition 0:                                                 
    Storage Subsystem Name = 'DS5100'                            
        hdisk      LUN #   Ownership          User Label         
        hdisk2         0   A (preferred)      LUN01              
        hdisk3         1   B (preferred)      LUN02              
        hdisk4         2   A (preferred)      LUN03              
        hdisk5         3   B (preferred)      LUN04              
        hdisk6         4   A (preferred)      LUN05              
        hdisk7         5   B (preferred)      LUN06              
        hdisk8         6   A (preferred)      LUN07              
        hdisk9         7   B (preferred)      LUN08              
        hdisk10        8   A (preferred)      LUN09              
        hdisk11        9   B (preferred)      LUN10              
        hdisk12       10   A (preferred)      LUN11              
        hdisk13       11   B (preferred)      LUN12