Description of problem: EMC powerpath LUNs with LVM2 Version-Release number of selected component (if applicable): [root@db163 etc]# uname -a Linux db163 2.6.9-34.ELsmp #1 i686 i686 i386 GNU/Linux [root@db163 etc]# rpm -qa|grep lvm2 lvm2-2.02.01-1.3.RHEL4 How reproducible: [root@db163 etc]# powermt display dev=all|grep name|sort Pseudo name=emcpowera Pseudo name=emcpowerb Pseudo name=emcpowerc Pseudo name=emcpowerd Pseudo name=emcpowere Pseudo name=emcpowerf Pseudo name=emcpowerg Pseudo name=emcpowerh Pseudo name=emcpoweri Pseudo name=emcpowerj Pseudo name=emcpowerk Pseudo name=emcpowerl Pseudo name=emcpowerm Pseudo name=emcpowern Pseudo name=emcpowero Pseudo name=emcpowerp Pseudo name=emcpowerq Pseudo name=emcpowerr Pseudo name=emcpowers Pseudo name=emcpowert [root@db163 etc]# vgscan Reading all physical volumes. This may take a while... No volume groups found [root@db163 etc]# pvscan No matching physical volumes found [root@db163 etc]# pvcreate /dev/emcpowera Physical volume "/dev/emcpowera" successfully created [root@db163 etc]# pvscan Found duplicate PV 2g6Ax3DkSa1wL7k5CpCxi10xwmi6prnK: using /dev/sdcd not /dev/emcpowera Found duplicate PV 2g6Ax3DkSa1wL7k5CpCxi10xwmi6prnK: using /dev/sdv not /dev/sdcd Found duplicate PV 2g6Ax3DkSa1wL7k5CpCxi10xwmi6prnK: using /dev/sdap not /dev/sdv Found duplicate PV 2g6Ax3DkSa1wL7k5CpCxi10xwmi6prnK: using /dev/sdbj not /dev/sdap PV /dev/sdbj lvm2 [167.06 GB] Total: 1 [167.06 GB] / in use: 0 [0 ] / in no VG: 1 [167.06 GB] Steps to Reproduce: 1.pvcreate /dev/emcpowera 2.vgscan Actual results: [root@db163 etc]# pvcreate /dev/emcpowerb Physical volume "/dev/emcpowerb" successfully created [root@db163 etc]# pvscan Found duplicate PV 2g6Ax3DkSa1wL7k5CpCxi10xwmi6prnK: using /dev/sdcd not /dev/emcpowera Found duplicate PV xDa3WEQ7ksOh90SsQZLkxT2woulSzMUk: using /dev/sdt not /dev/emcpowerb Found duplicate PV 2g6Ax3DkSa1wL7k5CpCxi10xwmi6prnK: using /dev/sdv not /dev/sdcd Found duplicate PV xDa3WEQ7ksOh90SsQZLkxT2woulSzMUk: using /dev/sdan not /dev/sdt Found duplicate PV 2g6Ax3DkSa1wL7k5CpCxi10xwmi6prnK: using /dev/sdap not /dev/sdv Found duplicate PV xDa3WEQ7ksOh90SsQZLkxT2woulSzMUk: using /dev/sdbh not /dev/sdan Found duplicate PV 2g6Ax3DkSa1wL7k5CpCxi10xwmi6prnK: using /dev/sdbj not /dev/sdap Found duplicate PV xDa3WEQ7ksOh90SsQZLkxT2woulSzMUk: using /dev/sdcb not /dev/sdbh PV /dev/sdbj lvm2 [167.06 GB] PV /dev/sdcb lvm2 [167.06 GB] Total: 2 [334.12 GB] / in use: 0 [0 ] / in no VG: 2 [334.12 GB] Expected results: Additional info:
I think this was some device-mapper-multipath misconfiguration, paths should not be visible as separate devices. I this configuration should work with recent updates...