<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 TRANSITIONAL//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=UTF-8"> <META NAME="GENERATOR" CONTENT="GtkHTML/3.24.5"> </HEAD> <BODY> Don't know if this will help your particular issue, but did you change /etc/lvm/lvm.conf to only look at PowerPath devices, and not SCSI disks? I don't use a quorum disk, so I would like to see what the final solution is, too. For example, on an HP DL385: filter = [ "a/cciss/", "a/emcpower/", "r/.*/" ] This tells LVM to only use PVs on the internal Compaq SCSI RAID controller and under PowerPath control. If you do not do specify this, and if a path goes down, you are at risk of losing the entire VG. <TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%"> <TR> <TD> <HR LENGTH="40%"> Robert Hurst, Sr. Caché Administrator Beth Israel Deaconess Medical Center 1135 Tremont Street, REN-7 Boston, Massachusetts 02120-2140 617-754-8754 ∙ Fax: 617-754-8730 ∙ Cell: 401-787-3154 Any technology distinguishable from <A HREF="http://www.mega-cart.com">magic</A> is insufficiently advanced. </TD> </TR> </TABLE> On Mon, 2009-04-27 at 06:17 -0700, Roberto Fratelli wrote: <BLOCKQUOTE TYPE=CITE> <PRE> Hello everyone ! I'm trying to set up a quorum disk in a 2-node redhat cluster (RHEL 4.7). Both nodes are attached to a SAN Clariion over qlogic HBA's and i'm using EMC's powerpath. The problem i'm facing is that the disks's device names are different across the nodes. For example, the lun i elected to be my quorum disk is called '/dev/emcpowerf' at node-a and '/dev/emcpowerd' at node-b, so i can't use the device name (/dev/emcpowerXX) in my cluster.conf file. In a attempt to overcome this i've tried to use the disk label instead : <quorumd label="97196ef0-da2f-4b79-a5c5-999dce70d677" interval="2" tko="10" votes="1"/> But did not work also, because this way it finds '/dev/sdXX' before '/dev/emcpowerXX': root@node-a:~ # cman_tool nodes Node Votes Exp Sts Name 0 1 0 M /dev/sdf1 1 1 2 M node-a 2 1 2 M node-b root@node-a:~ # Since this '/dev/sdf' is just one of the paths i have under powerpath (it has 4 paths per HBA, 8 paths per lun total) i can't keep it this way because in a event of lun trespass (clariion does it very often) i would loose quorum. My understanding is that i need some kind of "persistent binding" so i can use Powerpath's pseudo-device '/dev/emcpowerXX', so i tried to create a UDEV rule like this: [root@node-a RSM]# cat 75-quorum.rules KERNEL=="emcpower[a-z]1, SYSFS{label}=="97196ef0-da2f-4b79-a5c5-999dce70d677", SYMLINK+="discodequorum%n" [root@node-a RSM]# Which did not worked, i think because UDEV starts way before powerpath. Does anyone here faced this problem before ? how can i keep the device names persistent across the nodes (at least for the quorum disk) ? Below some more info on my quorum's disk: root@node-a:~ # mkqdisk -L mkqdisk v0.5.2 /dev/sdf1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/sdo1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/sdx1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/sdag1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/sdap1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/sday1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/sdbh1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/sdbq1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/emcpowerf1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 root@node-a:~ # [root@node-b ~]# mkqdisk -L mkqdisk v0.5.2 /dev/sdf1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/sdo1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/sdx1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/sdag1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/sdap1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/sday1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/sdbh1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/sdbq1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 /dev/emcpowerd1: Magic: eb7a62c2 Label: 97196ef0-da2f-4b79-a5c5-999dce70d677 Created: Mon Dec 24 11:47:11 2007 Host: node-a Kernel Sector Size: 512 [root@node-b ~]# -- Linux-cluster mailing list <A HREF="mailto:Linux-cluster@redhat.com">Linux-cluster@redhat.com</A> <A HREF="https://www.redhat.com/mailman/listinfo/linux-cluster">https://www.redhat.com/mailman/listinfo/linux-cluster</A> </PRE> </BLOCKQUOTE> </BODY> </HTML>