<!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/3.14.3"> </HEAD> <BODY> I erase that cache before invoking EMC PowerPath, because I have had issues with changes not making it to that multipathing I/O solution. I have experienced no issues doing it adhoc, either. rescan-scsi bus doesn't necessarily work with the fiber channel cards... I have to send an equivalent scsi request command directly to the fc driver (in our case, we are using Emulex lpfc). An example script we use: <TT>#!/bin/bash</TT> <TT>#</TT> <TT># rescan Emulex Fiber Channel card for new SCSI devices</TT> <TT>#</TT> <TT>ACTION=`basename $0`</TT> <TT>powermt display dev=all | grep emcpower > /tmp/$ACTION.old</TT> <TT>echo 0 > /sys/class/fc_host/host0/issue_lip</TT> <TT>echo "- - -" > /sys/class/scsi_host/host0/scan</TT> <TT>echo 1 > /sys/class/fc_host/host1/issue_lip</TT> <TT>echo "- - -" > /sys/class/scsi_host/host1/scan</TT> <TT>powermt config</TT> <TT>powermt display dev=all | grep emcpower > /tmp/$ACTION.new</TT> <TT>echo "Differences before & after"</TT> <TT>echo "=========================="</TT> <TT>diff /tmp/$ACTION.old /tmp/$ACTION.new</TT> On Tue, 2007-10-02 at 09:26 -0700, Ray Charles wrote: <BLOCKQUOTE TYPE=CITE> <PRE> Well, in my original attempt i did a rescan-scsi_bus, vgscan and lvscan but the new partition didn't show up. I think you're on to something that i also want to try and that's the /etc/lvm/.cache. Any precautions? -tia </PRE> </BLOCKQUOTE> </BODY> </HTML>