Wu,<br>
<br>
OCFS label does not work with EMC powerdevices. EMC powerdevices uses a
logical ID number which knows the path to the correct LUNs on the
backend. Compare those on each nodes and they will be the same. Do a
powermt display dev=all and you find that long number which will be the
same across nodes. If you need a consistent look and feel across all
the nodes you will need to copy the Powerpath config file across nodes
and then reboot. What version of PowerPath are you using?<br>
<br>
Hope that helps.<br>
<br>
Raj<br><br><div><span class="gmail_quote">On 8/31/05, <b class="gmail_sendername">Wu, Hai</b> <<a href="mailto:hxwu@tribune.com">hxwu@tribune.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Thanks
Joel. If I can't use OCFS label, then how can I make sure I am still
mounting the same emcpower device if we need to add/remove powerpath
LUNs? I know that devlabel would not work in this case. (And IBM this
its own way of dealing with this problem, not sure about EMC in this
case).<br><br>Thanks,<br>Hai<br><br>-----Original Message-----<br>From: Joel Becker [mailto:<a href="mailto:Joel.Becker@oracle.com">Joel.Becker@oracle.com</a>]<br>Sent: Wed 8/31/2005 8:28 PM<br>To: Wu, Hai<br>Cc:
<a href="mailto:ocfs-users@oss.oracle.com">ocfs-users@oss.oracle.com</a><br>Subject: Re: [Ocfs-users] problem with OCFS label<br>On Wed, Aug 31, 2005 at 06:42:20PM -0500, Wu, Hai wrote:<br>> But when I tried to mount this ocfs filesystem by label, it gave me the following error.
<br>> # mount -L data13 /oradata/data13<br>> mount: the label data13 occurs on both /dev/emcpowerp1 and /dev/sdad1 - not mounted<br><br> This isn't a bug, this is a common problem with multipath.<br>mount(8) does not know that /dev/emcpowerp1 and /dev/sdad1 are the same
<br>drive. So it cannot decide which to use. You must mount by device name<br>in this case.<br><br>Joel<br><br>--<br><br>"Gone to plant a weeping willow<br> On the bank's green edge it will roll, roll, roll.<br> Sing a lulaby beside the waters.
<br> Lovers come and go, the river roll, roll, rolls."<br><br>Joel Becker<br>Senior Member of Technical Staff<br>Oracle<br>E-mail: <a href="mailto:joel.becker@oracle.com">joel.becker@oracle.com</a><br>Phone: (650) 506-8127
<br><br><br>_______________________________________________<br>Ocfs-users mailing list<br><a href="mailto:Ocfs-users@oss.oracle.com">Ocfs-users@oss.oracle.com</a><br><a href="http://oss.oracle.com/mailman/listinfo/ocfs-users">
http://oss.oracle.com/mailman/listinfo/ocfs-users</a><br></blockquote></div><br>