环境：
系统：sles11 sp2
磁阵：EMC AX4-5
连接：每个服务器2块HBA卡
report1:~ # rpm -ivh EMCPower.LINUX-5.7.0.00.00-421.SLES11SP2.x86_64.rpm
Preparing... ########################################### [100%]
1:EMCpower.LINUX ########################################### [100%]
All trademarks used herein are the property of their respective owners.
NOTE:License registration is not required to manage the CLARiiON AX series array.
*** IMPORTANT ***
Please check the following configurations before starting PowerPath:
- Set LVM filter in /etc/lvm/lvm.conf according to PowerPath recommendation.
- Blacklist all devices in /etc/multipath.conf and stop multipathd service.
- Install PowerPath license(s) and ensure that policy is not set to BasicFailover.
- If no license is available, ensure that only one HBA port is active in the host.
PowerPath supports only single-HBA configuration when unlicensed.
Refer to PowerPath Installation and Administration Guide for details.
问题：安装powerpath之前，fdisk -l只能看到3块盘，其中本地盘一块，磁阵AX4-5 2个盘（2个lun，每个lun只发现一条路径），但安装后，发现每个lun为2条路径，不知为什么？
PS:如果双机两边emcpower盘符不一致，可以采用emcpadm命令修改一致
emcpadm rename -s emcpowerx -t emcpowerX