显然自动聚合。
AIX 5.2 之前默认是 RDAC
AIX - MPIO Driver, AIX 5L 5.2 (October 2002) and later

在AIX上确认当前正在使用MPIO还是RDAC，执行“manage_disk_drivers”

manage_disk_drivers

mpio_get_config -Av (适用于DS3K/DS4K的MPIO路径查询）

RDAC：fget_config -Av
SDDPCM: sddpcm_get_config -Av

MPIO路径的常用操作
1、查看单个盘的路径

lspath -l hdisk3

lspath -F "status name path_id parent connection" | grep -w hdisk3

2、MPIO路径控制
将fcs0卡下的hdisk2的路径禁用

chpath -l hdisk2 -p fscsi0 -s disable

将fcs0卡下的hdisk2的路径启用

chpath -l hdisk2 -p fscsi0 -s enable

3、其它参数

chdev -l hdisk3 -a queue_depth=1 //如果ODM是1.0.1.0以上可以是任何数字

chdev -l hdisk3 -a hcheck_interval=60 //链路失效检查时间间隔;如果等0，则不会自检

chdev -l hdisk3 hcheck_mode=nonacive

This parameter specifies which I/O paths should be monitored by the path health checking
functionality.
nonactive: This mode will check all failed I/O paths and all standby paths of used/opened
devices.
failed: This mode with check failed I/O paths only.
enabled: This mode will check all enabled I/O paths which are opened.
Note:
Non-opened devices are not monitored. Also, this attribute is
not being used at this time since path health checking is not
enabled. This attribute can be ignored
4、修改链路优先级
lspath -AHE -l hdisk2 -p vscsi3 //查看链路优先级

chpath -l hdisk3 -p fscsi0 -w 链路1 -a priority=1

chpath -l hdisk3 -p fscsi0 -w 链路2 -a priority=2

=============================================
Dynamic load balancing 动态负载均衡
Traffic shaping 流量控制
Automatic path management 自动路径管理
Dynamic reconfiguration 动态设置
Multipath I/O software implementations 多路径软件工具