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

[Kearnan_Keith at emc.com]

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 at redhat.com [mailto:linux-lvm-bounces at redhat.com] On
Behalf Of Allen, Jack
Sent: Wednesday, October 26, 2005 5:24 PM
To: 'linux-lvm at 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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