SUN平台新装完PowerPath之后，一定要确认路径Policy的状态，需要改为CLAROpt的双Active模式（加入License之后）！
步骤如下：
另外，在没有安装PP软件之前，format的输出中，OS只能够发现一般的路径和硬盘，另外一般的硬盘类型是Unknow的状态。
# /etc/powermt display dev=all
Pseudo name=emcpower0a
CLARiiON ID=CK200074900142 [emc3]
Logical device ID=6006016015D21E006FA82325D019DD11 [LUN 2]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
3074 c3t5006016041E04ED6d0s0 SP A0 active alive 0 0
3074 c3t5006016841E04ED6d0s0 SP B0 active alive 0 0
3072 c4t5006016141E04ED6d0s0 SP A1 unlic alive 0 0
3072 c4t5006016941E04ED6d0s0 SP B1 unlic alive 0 0
# /etc/powermt set policy=co
Error: "co" is not a valid policy for CLARiiON storage systems with the installed license.
#添加License之前的修改，会去check license的状态。报错！！
# /etc/emcpreg -add xxxxxxxxxxxxxxxxxx
1 key(s) successfully added.
# /etc/powermt set policy=co
# /etc/powermt display dev=all
Pseudo name=emcpower0a
CLARiiON ID=CK200074900142 [emc3]
Logical device ID=6006016015D21E006FA82325D019DD11 [LUN 2]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
3074 c3t5006016041E04ED6d0s0 SP A0 active alive 0 0
3074 c3t5006016841E04ED6d0s0 SP B0 active alive 0 0
3072 c4t5006016141E04ED6d0s0 SP A1 active alive 0 0
3072 c4t5006016941E04ED6d0s0 SP B1 active alive 0 0
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