linux更改emc磁盘盘符
具体环境描述请见上一篇文章(http://blog.chinaunix.net/uid-28255964-id-5753714.html)，本文章主要介绍linux系统下，更改磁盘Minor#
查看两边识别到磁盘的uuid
节点2
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowera
36006016007b04000184b075892a4d03b
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerb
36006016007b04000184b0758ffb5cf84
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerc
36006016007b04000174b0758c7d16373
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerd
36006016007b04000164b07580ec61c93
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowere
36006016007b04000174b0758ece00fd7
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerf
36006016007b04000154b07582d81834a
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerg
36006016007b04000154b075826f1cdf7
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerh
36006016007b04000144b07580d38d995
节点1
[root@vincent1 ~]#/sbin/scsi_id -g -u -d /dev/emcpowera
36006016007b04000184b075892a4d03b
[root@vincent1 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerb
36006016007b04000184b0758ffb5cf84
[root@vincent1 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerc
36006016007b04000174b0758c7d16373
[root@vincent1 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerd
36006016007b04000174b0758ece00fd7
[root@vincent1 ~]#/sbin/scsi_id -g -u -d /dev/emcpowere
36006016007b04000164b07580ec61c93
[root@vincent1 ~]# /sbin/scsi_id-g -u -d /dev/emcpowerf
36006016007b04000154b07582d81834a
[root@vincent1 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerg
36006016007b04000154b075826f1cdf7
[root@vincent1 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerh
36006016007b04000144b07580d38d995
从上面可以看出两个节点的emcpowerd和emcpowere的uuid反了，所以在1节点上将emcpowerd和emcpowere的盘符互换，以达到两边保持一致
下面的调整的步骤
可以使用下面的命令查看可用Minor号
[root@vincent1 database]#emcpadm getfreepseudos -n 5 -b 20
开始调整，首先将emcpowerd占用的Minor#释放出来
[root@vincent1 ~]# emcpadmrenamepseudo -s 48 -t 128
将emcpowere调整为emcpowerd
[root@vincent1 ~]# emcpadmrenamepseudo -s 64 -t 48
将emcpowerd的Minor#换成48
[root@vincent1 ~]# emcpadmrenamepseudo -s 128 -t 64
到此emcpowerd和emcpowere的Minor#交换完毕
[root@vincent1 ~]# emcpadmgetusedpseudos
PowerPath pseudo device namesin use:
Pseudo DeviceName Major# Minor#
emcpowera120 0
emcpowerb120 16
emcpowerc120 32
emcpowerd120 48
emcpowere 12064
emcpowerf120 80
emcpowerg120 96
emcpowerh 120112
再次查看两边磁盘的uuid
[root@vincent1 ~]#/sbin/scsi_id -g -u -d /dev/emcpowera
36006016007b04000184b075892a4d03b
[root@vincent1 ~]# /sbin/scsi_id-g -u -d /dev/emcpowerb
36006016007b04000184b0758ffb5cf84
[root@vincent1 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerc
36006016007b04000174b0758c7d16373
[root@vincent1 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerd
36006016007b04000164b07580ec61c93
[root@vincent1 ~]#/sbin/scsi_id -g -u -d /dev/emcpowere
36006016007b04000174b0758ece00fd7
[root@vincent1 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerf
36006016007b04000154b07582d81834a
[root@vincent1 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerg
36006016007b04000154b075826f1cdf7
[root@vincent1 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerh
36006016007b04000144b07580d38d995
节点2
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowera
36006016007b04000184b075892a4d03b
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerb
36006016007b04000184b0758ffb5cf84
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerc
36006016007b04000174b0758c7d16373
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerd
36006016007b04000164b07580ec61c93
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowere
36006016007b04000174b0758ece00fd7
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerf
36006016007b04000154b07582d81834a
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerg
36006016007b04000154b075826f1cdf7
[root@vincent2 ~]#/sbin/scsi_id -g -u -d /dev/emcpowerh
36006016007b04000144b07580d38d995
两边一致