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Date: Wed, 10 May 2006 16:12:28 -0300
From: German Staltari <gstaltari@arnet.net.ar>
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Subject: [linux-lvm] lot of scsi devices bug
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To: linux clustering <linux-cluster@redhat.com>, LVM general discussion and development <linux-lvm@redhat.com>

Hi, this is maybe a udev bug, but it affected me when I was creating a 
lv in a cluster, so it could help some with this configuration.
When I added some scsi disk (SAN) to the cluster nodes (more than 64 
SCSI devices),  udev created the device node for capi20 instead of sdbm. 
This produced  a bad behavior in lvm when I was trying to create the 
vg's and lv's, it started to give errors like:

Error locking on node node-06: Internal lvm error, check syslog
Error locking on node node-05: Internal lvm error, check syslog
Error locking on node node-04: Internal lvm error, check syslog
Error locking on node node-01: Internal lvm error, check syslog
Error locking on node node-02: Internal lvm error, check syslog
Error locking on node node-03: Internal lvm error, check syslog
Failed to activate new LV.

When I commented out this lines

SYSFS{dev}="68:0",              NAME="capi20"
SYSFS{dev}="191:[0-9]*",        NAME="capi/%n"
KERNEL=="capi*",                MODE="0660"

in /etc/udev/rules.d/50-udev.rules, everything worked again.

I hope this could help,
German Staltari