早期客户两台AIX HACMP双机，在发生切换时，出现接收方卷组信息丢失，所连存储为EMC存储。后来通过设置EMC生成的hdiskpowerXX的参数reserve_lock=no问题得到解决
chdev -l hdiskpower0 -a reserve_lock=no
chdev -l hdiskpower1 -a reserve_lock=no
chdev -l hdiskpower2 -a reserve_lock=no
chdev -l hdiskpower3 -a reserve_lock=no
chdev -l hdiskpower4 -a reserve_lock=no
chdev -l hdiskpower5 -a reserve_lock=no
或
for i in 0 1 2 3 4 5
do chdev –l hdiskpoweri –a reserve_lock=no
done
过去存储为EVA存储，中间做过迁移，应该迁移后参数未修改，否则出错就不是在现在，过去就应该出现了，为啥后来做的人不做个测试，测试一下马上就能发现问题。
Cannot remove hdiskpower devices due to a method error(/etc/methods/ucfgpowerdisk)
The fix is to uninstall/reinstall Powerpath, but you won’t be able to until you remove the hdiskpower devices with this procedure:
# odmdelete -q name=hdiskpowerX -o CuDv
(for every hdiskpower device)
# odmdelete -q name=hdiskpowerX -o CuAt
(for every hdiskpower device)
# odmdelete -q name=powerpath0 -o CuDv
# odmdelete -q name=powerpath0 -o CuAt
# rm /dev/powerpath0
You must remove the modified files installed by powerpath and then reboot the server. You will then be able to uninstall powerpath after the reboot via the “installp -u EMCpower” command. The files to be removed are as follows:
(Do not be concerned if some of the removals do not work as PowerPath may not be fully configured properly).
rm ./etc/PowerPathExtensions
rm ./etc/emcp_registration
rm ./usr/lib/boot/protoext/disk.proto.ext.scsi.pseudo.power
rm ./usr/lib/drivers/pnext
rm ./usr/lib/drivers/powerdd
rm ./usr/lib/drivers/powerdiskdd
rm ./usr/lib/libpn.a
rm ./usr/lib/methods/cfgpower
rm ./usr/lib/methods/cfgpowerdisk
rm ./usr/lib/methods/chgpowerdisk
rm ./usr/lib/methods/power.cat
rm ./usr/lib/methods/ucfgpower
rm ./usr/lib/methods/ucfgpowerdisk
rm ./usr/lib/nls/msg/en_US/power.cat
rm ./usr/sbin/powercf
rm ./usr/sbin/powerprotect
rm ./usr/sbin/pprootdev
rm ./usr/lib/drivers/cgext
rm ./usr/lib/drivers/mpcext
rm ./usr/lib/libcg.so
rm ./usr/lib/libcong.so
rm ./usr/lib/libemcp_mp_rtl.so
rm ./usr/lib/drivers/mpext
rm ./usr/lib/libmp.a
rm ./usr/sbin/emcpreg
rm ./usr/sbin/powermt
rm ./usr/share/man/man1/emcpreg.1
rm ./usr/share/man/man1/powermt.1
rm ./usr/share/man/man1/powerprotect.1
Re-install Powerpath.
tags: /etc/methods/ucfgpowerdisk.EMC, devices, Error, hdiskpower, method, Remove
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