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RE: [linux-lvm] lvm.conf questions and EMC PowerPath



Title: lvm.conf questions and EMC PowerPath
Hi Jack,
 
1) What filter do I need in lvm.conf to allow sda and emcpower?, but reject all the other sdb and up name. I have tried many different one, but can not eliminate the sd? device names.
 
This is covered in the PowerPath 4.4 for Linux Release Notes.  There are three different scenarios listed depending on what your configuration is.
 
2) Does the system have to be rebooted for the filter to work with the various LVM commands, vgdisplay, vgscan?
 
No, "vgscan -v" should be executed.
 
-Keith Kearnan
 
This is covered with examples in EMC's Knowledge Base, see solution emc118561.
 


From: linux-lvm-bounces redhat com [mailto:linux-lvm-bounces redhat com] On Behalf Of Allen, Jack
Sent: Wednesday, October 26, 2005 5:24 PM
To: 'linux-lvm redhat com'
Subject: [linux-lvm] lvm.conf questions and EMC PowerPath

        I am trying to setup a system using EMC PowerPath. The SAN has 5 LUNS assigned to this system. Since there are 2 FC ports on the system going to 2 switches that have 2 links to the SAN the system sees 20 sd devices starting with sdb. And PowerPath cerates 5 emcpower? name in /dev. The sda device is local.

        One problem I have now is, at boot time the system complains about duplicate PVs being found. A VG was created with the emcpower? names, but after reboot when you do vgdisplay it shows the emcpower? names and lost of the sd? names in the VG.

1) What filter do I need in lvm.conf to allow sda and emcpower?, but reject all the other sdb and up name. I have tried many different one, but can not eliminate the sd? device names.

2) Does the system have to be rebooted for the filter to work with the various LVM commands, vgdisplay, vgscan?

Thanks:
        Jack Allen


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