现状为：

主机（HP-UX)挂机了EMC存储后，通过ioscan -fnCdisk能够看到EMC存储盘，但是通过diskinfo /dev/rdsk/cxtxdx报 error错误。

解决方法：

出现该问题主要是由于powerpath引起，具体解决如下：

# powermt display dev=all
Pseudo name=emcpower4a
CLARiiON ID=CK200041200044
Logical device ID=6006016028A610000AF03A428708D911
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP B, current=Unknown
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
2304 pci@8/fibre-channel@4 c2t0d3s0 SP B0 active dead 0 0
2304 pci@8/fibre-channel@4 c2t1d3s0 SP A0 active dead 0 0
2305 pci@8/fibre-channel@5 c3t0d3s0 SP B0 active dead 0 0
2305 pci@8/fibre-channel@5 c3t1d3s0 SP A0 active dead 0 0

这些state为 dead的状态都是错误的.

3.执行重新配置

# powermt check
Warning: CLARiiON device path c2t0d0s0 is currently dead.
Do you want to remove it (y/n/a/q)? y
Warning: CLARiiON device path c2t0d1s0 is currently dead.
Do you want to remove it (y/n/a/q)? y
Warning: CLARiiON device path c2t0d2s0 is currently dead.
Do you want to remove it (y/n/a/q)? a
Warning: CLARiiON device path c2t0d3s0 is currently dead.
Warning: CLARiiON device path c2t0d4s0 is currently dead.
Warning: CLARiiON device path c2t1d0s0 is currently dead.
Warning: CLARiiON device path c2t1d1s0 is currently dead.

# powermt config
# powermt save
# powermt display dev=all
Pseudo name=emcpower7a
CLARiiON ID=CK200041200044 [Storage Group 2]
Logical device ID=6006016028A61000482F2BA9720CD911 [LUN 1]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP B, current=SP B
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
2304 pci@8/fibre-channel@4 c2t0d0s0 SP B0 active alive 0 0
2304 pci@8/fibre-channel@4 c2t1d0s0 SP A0 active alive 0 0
2305 pci@8/fibre-channel@5 c3t0d0s0 SP B0 active alive 0 0
2305 pci@8/fibre-channel@5 c3t1d0s0 SP A0 active alive 0 0

此时的state 为 alive状态，表示正常.